THE   UNIVERSITY 

OF  ILLINOIS 

LIBRARY 


AGRICULTURAL 
LIBRARY 


UNIVERSITY  OF  ILLINOIS 

Agricultural  Experiment  Station 


BULLETIN  No.  219 


ILLINOIS  CROP  YIELDS  FROM  SOIL 
EXPERIMENT  FIELDS 


By  CYRIL  G.  HOPKINS,  F.  W.  GARRETT,  J.  E.  WHITCHURCH, 
AND  H.  F.  T.  FAHRNKOPF 


CONTENTS  OF  BULLETIN  No.  219 


INTRODUCTION PAGE  401 


EXPEEIMENT  FIELDS: 

PAGE 

Aledo 405,07 

Antioch 406-07 

Bloomington 408, 10 

Carlinville 409-10 

Carthage 411, 13 

Clayton 412-13 

Cutler 414-16 

DeKalb 417-19 

Dixon 420-22 

DuBois 423-24 

Enfield 425,27 

Ewing 426-27 

Fairfield   428-30 

Galesburg 431-34 

Hartsburg 435-36 

Joliet 437-38 

Kewanee 439 

LaMoille 440-41 

Lebanon   442-44 

McNabb 445,  47 

Minonk    .  ..446-47 


PAGE 

Mt.  Morris 448-49 

Newton   450-54 

Oblong 455-56 

Odin  .   457-61 

Oquawka 462-63 

Pana 463-65 

Baleigh 466-67 

Eoekford 468-72 

Sidell ;..473-74 

Sparta 475-76 

Spring  Valley 477 

Toledo 478-79 

Union  Grove    480-82 

Unionville 483-85 

Urbana 

Morrow  Plots    486-87 

North  Farm 488-90 

South  Farm   491-97 

Virginia 498-500 

West  Salem   .  ..501-02 


INDEX  (Fields  arranged  according  to  soil  types) PAGE  503 


STATE  ADVISORY    COMMITTEE   ON   SOIL   INVESTIGATIONS 

Ealph  Allen,  Delavan  A.  N.  Abbott,  Morrison 

F.  I.  Mann,  Oilman  J.   P.   Mason,  Elgin 

C.  V.  Gregory,  538  South  Clark  Street,  Chicago 


AGRICULTURAL  EXPERIMENT  STATION  STAFF  ON  SOIL  INVESTIGATIONS 

Eugene  Davenport,  Director 

Cyril  G.   Hopkins,  Chief  in  Agronomy  and  Chemistry 


Soil  Survey — 

J.  G.  Mosier,  Chief 
*A.  F.  Gustafson,  Assistant  Chief 
H.  C.  Wheeler,  Associate 
F.  A.  Fisher,  Associate 

F.  W.  Wascher,  Associate 
R.  S.  Smith,  Associate 

O.  I.  Ellis,  Associate 

G.  E.  Gentle,  Associate 

Soil  Analysis — 

Robert  Stewart,   Chief 
*E.  Van  Alstine,  Assistant  Chief 
W.  H.    Sachs,   Associate 
W.  R.  Leighty,  Associate 
Willem  Rudolfs,  Assistant 
J.  L.  St.  John,  Assistant 


Soil  Biology — 

A.  L.  Whiting,  Associate  Chief 

Roy  Hansen,  First  Assistant 

T.  E.  Richmond,  First  Assistant 

Soil  Experiment  Fields — 

F.  A.  Wyatt,  Assistant  Chief 
*F.  C.   Bauer,  Assistant  Chief 
J.    E.   Whitchurch,   Associate 
F.  W.  Garrett,  Associate 
H.  J.  Snider,  Associate 
H.  C.  Gilkerson,  Associate 
H.  F.  T.  Fahrnkopf,  Associate 
M.  I.  Wolkoff,  First  Assistant 

E.  E.  Glick,  Assistant 

F.  H.  Kelley,  Assistant 


*On  leave 


ILLINOIS  CROP  YIELDS  FROM  SOIL 
EXPERIMENT  FIELDS 

BY  CYRIL   G.  HOPKINS,   F.   W.  GAEEETT,  J.   E.   WHITCHURCH, 
AND  H.  F.  T.  FAHENKOPF 

INTRODUCTION 

Herein  are  reported  the  detailed  results  from  thirty-eight  Illinois 
soil  experiment  fields1  up  to  and  including  those  of  1917.  A  number 
of  these  fields  were  established  in  the  summer  and  fall  of  1901  and 
the  others  have  been  put  into  operation  at  various  times  since  then, 
some  being  only  a  few  years  old.  •  The  Morrow  plots  at  the  University 
have  been  in  operation  since  1879,  and  so  far  as  is  known  are  the 
oldest  experimental  plots  in  America. 

Most  of  these  experiment  fields  contain  about  20  acres  each,  a  few 
contain  from  25  to  40  acres,  and  a  few  have  less  than  10  acres.  Each 
field  is  divided  into  series  which  correspond  to  the  different  fields  upon 
a  farm,  and  upon  which  is  grown  a  definite  rotation  of  crops.  Each 
series  is  further  divided  into  smaller  areas,  usually  into  ten  fifth-acre 
plots.  The  individual  plots  are  treated  in  such  a  manner  that  posi- 
tive information  can  be  secured  in  regard  to  the  needs  of  the  soil. 
Untreated  plots  are  retained  as  checks  in  order  to  determine  the  effect 
of  every  kind  of  soil  treatment  applied. 

SYSTEMS  OF  FARMING 

On  most  of  the  experiment  fields  are  conducted  both  a  live-stock 
and  a  grain  system  of  farming. 

Under  the  live-stock  system  of  management,  the  nitrogen  and 
organic  matter  of  the  soil  are  maintained  by  applying  as  much  manure 
as  can  be  made  from  the  produce  grown  upon  the  land.  On  this  basis 
no  more  manure  is  applied  to  a  plot  than  can  be  made  from  the  pro- 
duce of  that  plot.  For  every  ton  of  produce  grown,  an  equiv- 
alent amount  of  average  farm  manure  is  returned  during  the 
rotation.  Under  a  good  system  of  live-stock  farming  it  has  been  found 
that  about  one  ton  of  average  manure  can  be  made  from  one  ton  of 
feed  and  bedding.  A  large  amount  of  the  grain  produced  is  fed,  in 
the  live-stock  system,  the  legumes  harvested  as  hay,  and  the  hay, 
straws,  and  stovers  used  for  feeding  and  bedding  purposes. 

In  the  grain  system  of  farming,  no  manure  is  applied  to  the  land. 
The  nitrogen  and  organic  matter  of  the  soil  are  maintained  by  plow- 
ing under  all  crop  residues  (straws,  corn  stalks,  all  of  the  legume 

JFor  more  detailed  information  concerning  these  fields,  see  Bulletin  193. 

401 


402  BULLETIN  No.  219  [May, 

crops  from  which  the  seed  has  been  removed,  and  also  cover  crops  of 
legumes).  The  regular  legume  crops  are  so  managed  that  a  seed  crop 
is  secured  if  possible,  and  all  resulting  residues  are  returned  to  the 
soil.  Sometimes  the  first  crop  of  red  clover  or  sweet  clover  is  clipped 
and  the  clippings  left  upon  the  land ;  the  second  crop  is  then  harvested 
for  seed  and  the  chaff  returned  to  the  land.  The  first  growth  of  mam- 
moth clover  is  rolled  down  so  that  most  of  it  is  left  on  the  land  when 
the  seed  crop  is  harvested.  Sometimes  seed  is  saved  from  both  the 
first  and  the  second  cuttings  of  red  clover,  or  the  first  crop  may  be 
allowed  to  stand  and  be  harvested  with  the  second  growth.  Alsike  is 
also  grown  and  is  harvested  for  hay  in  the  live-stock  system  and  for 
.seed  in  the  grain  system.  When  alfalfa  is  included  in  the  rotation, 
it  is  harvested  for  hay  in  both  systems.  The  first  cutting  of  red  clover 
or  of  sweet  clover  may  sometimes  be  made  into  hay  in  the  grain  sys- 
tem, as  well  as  in  the  live-stock  system,  especially  after  the  soil  becomes 
rich  in  organic  matter.  The  residues  from  the  grain  and  legume  crops 
may  be  plowed  under  directly,  or  they  may  be  used  as  a  top-dressing 
for  the  protection  of  winter  crops  and  eventually  plowed  under. 

ROTATIONS 

On  the  Illinois  soil  experiment  fields  crops  are  grown  in  definite 
rotations.  On  some  fields  two  or  more  rotations  are  being  tried. 
There  are  usually^series  enough  so  that  all  the  rotation  crops  are  rep- 
resented every  year.  The  crops  grown  are  those  common  to  the  local- 
ity and  include  wheat,  corn,  barley,  rye,  red  clover,  mammoth  clover, 
alsike,  sweet  clover,  alfalfa,  cowpeas,  soybeans,  vetch,  timothy,  pota- 
toes, and  cotton. 

Standard  Rotation. — On  a  large  number  of  the  fields  a  standard 
four-year  rotation  is  practiced.  This  is  the  famous  Norfolk  rotation 
of  Europe  in  which  a  cultivated  crop  is  followed  by  a  spring  grain, 
the  spring  grain  by  a  legume,  and  the  legume  by  a  winter  grain. 
Such  a  rotation  permits  the  seeding  of  a  cover  crop  of  legumes  in  the 
winter  grain,  which  may  be  plowed  down  the  next  spring  before  the 
cultivated  crop  is  planted.  The  rotation  as  commonly  practiced  on 
the  Illinois  fields  is  corn,  oats,  clover,  and  wheat,  a  cover  crop  (usually 
sweet  clover)  being  seeded  on  the  young  wheat  in  the  spring  and 
plowed  under  in  the  fall  or  the  next  spring  before  the  corn  is  planted. 
In  the  event  of  clover  failure,  soybeans  are  substituted.  The  seeding 
of  a  legume  cover  crop  in  the  wheat  is  commonly  made,  however,  only 
on  the  plots  representing  the  grain  system  of  farming,  these  and  other 
crop  residues  serving  as  a  substitute  for  farm  manure. 

MATERIALS  FOR  SOIL  TREATMENT 

Altho  there  may  be  a  number  of  ways  of  meeting  the  needs  of  the 
soil  with  respect  to  better  production,  the  Illinois  Agricultural  Ex- 


1910]  ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS  403 

periment  Station  makes  use  largely  of  natural,  home-grown  materials. 
Instead  of  applying  expensive  complete  fertilizers,  which  may  produce 
a  more-or-less  rapid  response,  wide  use  is  made  of  such  natural  ma- 
terials as  farm  manure,  legume  crops,  crop  residues,  ground  limestone 
(both  ordinary  and  dolomitic,  each  of  which  is  found  in  abundance  in 
Illinois),  steamed  bone  meal  (a  farm  product),  and  ground  natural 
rock  phosphate.  Abundant  information  points  to  the  fact  that  in  the 
long  run  and  under  normal  conditions  the  use  of  these  materials  in 
well-planned  systems  of  farming  usually  proves  to  be  most  practical 
and  economical.  In  some  comparative  experiments  and  on  some  ab- 
normal soils,  purchased  nitrogen,  manufactured  acid  phosphate,  po- 
tassium salts,  and  other  commercial  fertilizers  are  used. 

Standard  Soil  Treatment. — In  connection  with  the  standard  four- 
year  rotation  mentioned  above,  a  rather  uniform  system  of  soil  treat- 
ment is  practiced  on  most  of  the  fields.  Both  the  live-stock  and  the 
grain  systems  of  farming,  as  already  described,  are  followed.  In 
each  system  on  each  series  an  untreated  plot  is  left,  which  serves  as 
a  check  for  the  systems  of  soil  treatment  applied.  There  are  plots 
receiving  only  the  application  of  manure  and  residues,  as  described ; 
some  which  receive  in  addition  pulverized  limestone;  some  which  re- 
ceive as  a  further  application  finely  ground  raw  rock  phosphate ;  and 
as  a  still  further  application,  in  the  grain  system,  one  plot  receives 
potash  salts ;  besides  which  there  is  a  third,  or  extra,  untreated  plot. 
The  manner  of  applying  and  the  amounts  of  the  materials  applied  are 
as  follows: 

Manure. — The  amount  that  can  be  made  in  farm  practice  from 
the  produce  of  the  land  is  usually  applied  for  the  corn  crop. 

Residues. — The  straw,  stalks,  chaff,  and  cover  crops  that  are 
produced  upon  the  land  are  returned  at  the  most  convenient  time 
during  the  rotation. 

Limestone. — Four  tons  per  acre  is  put  on  as  an  initial  application, 
and  thereafter  two  tons  every  four  years,  preferably  after  the  land 
is  plowed  for  wheat,  the  limestone  being  mixed  with  the  surface  soil 
in  preparing  the  seed  bed. 

Phosphate. — One  ton  is  applied  on  the  clover  sod  preceding  the 
plowing  of  the  land  for  wheat.  Disking  in  order  to  mix  the  phosphate 
with  the  soil  before  plowing  is  desirable.  (After  four  or  five  rotations, 
the  amount  applied  will  be  reduced  to  800  pounds  per  acre  every  four 
years.) 

Potash  Salts. — The  standard  application  is  800  pounds  of  kainit 
once  during  the  rotation,  usually  with  phosphate  before  the  wheat. 


404  BULLETIN  No.  219  [May, 


EXPLANATION  OF  SYMBOLS  USED 

0=Untreated  land 

M= Manure 

R=Residues 

L=Limestone 

P=Phosphorus  (raw  rock  phosphate  or  steamed  bone  meal) 

K=Kainit  or  other  salt  of  potassium 

N=Nitrogen  (usual  application  800  pounds  dried  blood) 
Cv.— 'Cover  crop  (legumes) 
(aP)=acid  Phosphate 
(bP)=Steamed  bone  meal  (Phosphorus) 
(sP)=slag  Phosphate 
(rP)=rock  Phosphate 

The  heavy  vertical  rule  indicates  the  beginning  of  full  treatment. 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


405 


TABLE  1. — ALEDO  FIELD:     CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  UPPER  iLLiNOiaan  GLACIATIO:: 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1910 
Oats5 

1911 
Corn1 

1912 
Oats2 

1913 
Clover8 

1914 

Wheat3 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

60.2 
37.5 
60.6 
60.  & 

69.3 
68.1 
67.6 
65.1 

49.2 
38.1 
40.8 
41.4 

(3.02) 
(3.16) 
(3  .  29) 
(3.55) 

27.0 
29.2 
31.8 
34.6 

52.8 
67.7 
67.9 

72.2 

51.9 
62.5 
65.8 
71.9 

(1-46) 
(2.23) 
(2.24) 
(2.38) 

M  

ML  
MLP... 

105 
106 
107 
108 

0... 

48.1 
55.0 
53.4 
46.1 

70.7 
64.6 
66.8 
69.2 

40.3 
40.6 
45.0 
46.9 

2.33 

2.42 
2.67 
1.92 

30.0 
30.6 
33.1 
36.1 

56.8 
58.3 
61.5 
69.1 

56.2 
52.5 
57.8 
60.0 

.50 
.58 
1.25 
1.75 

R    

RL  

RLP.... 

109 
110 

RLPK.. 

0  

61.4 
53  1 

65.8 
67  1 

43.1 
45.2 

2.50 
(3.06) 

32.7 
26.8 

63.1 
55  6 

62.8 
58.1 

1.33 

(1.93) 

Soy- 
beans5 

Wheat4 

Corn 

Oats 

Clover 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0  ..      . 

10.7 
11.0 
15.3 
13.7 

14.5 
14.7 
12.3 
9.7 

69.7 
78.8 
78.2 
83.1 

46.4 
43.4 
45.8 
45.9 

(1.03) 
(1.40) 

(2x54) 
(2.59) 

34.4 
40.8 
49.2 
50  0 

40  9 
50.9 
60  0 
57  9 

67.3 
68.3 
73.8 
53.6 

M  ..    .  . 

ML.  .  .  . 
MLP... 

205 

206 
207 
208 

0    .      . 

13.8 
14.2 
12.8 
10.8 

13.4 
13.7 
9.1 
14.4 

71.6 
73.9 
78.8 
84.5 

46.2 
40.6 
37.8 
41.7 

1.17 
.83 
.83 

.83 

42.5 
49.6 
49.6 
53  5 

45.3 
50  4 
52  9 
53.3 

72.2 
83.1 
88.3 
88.1 

R  

RL  

RLP.... 

209 
210 

RLPK.. 
0  

11.3 

11.7 

18.2 
15.0 

88.7 
80.5 

44.5 
45.5 

.17 

(1.24) 

50.4 
39.6 

52.6 

48.7 

92.3 
75.5 

Oats5 

Soy- 
beans1 

Wheat3 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0  

64.1 
58.6 
64.7 
57.3 

15.7 
17.1 
15.9 
13.6 

11.5 
12.6 
11.7 
13.8 

45.8 
44.2 
51.0 
49.9 

42.2 
51.6 
52.3 
53.1 

(1.38) 
(1.48) 

(1.52) 
(1.59) 

10.2 
22.2 
15.8 
19.2 

40.5 
55.5 
64.4 
68.7 

M  

ML.  .  .. 
MLP... 

305 
306 
307 
308 

0    . 

68.8 
64.5 
67.2 
55.9 

16.9 
15.8 
17.1 
13.3 

18.1 
14.4 
10.0 
10.8 

43.3 
46.0 
50.1 

48.8 

51.2 
51.6 
51.9 
55.2 

19.8 
19.8 
22.5 
24.0 

12.0 
12.2 
9.2 
12.8 

54.9 
53.7 
64.4 
68.6 

R 

RL  . 

RLP.... 

309 
310 

RLPK.. 

0  

66.7 
53.6 

13.2 
15.0 

13.3 
9.0 

50.5 
44.8 

52.5 
45.8 

24.8 
(1-44) 

16.2 
13.7 

70.1 
55.6 

Corn5 

Oats1 

Soy- 
beans8 

Wheat3 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0  

45.9 
74.9 
81.2 
82.1 

53.3 
51.7 
53.4 
51.6 

(1.41)8 
(1.41) 
(1.41) 
(1.41) 

39.6 
37.7 
38.0 
37.7 

43.7 
57.6 
60.0 
62.9 

71.9 
82.0 
89.7 
93.4 

(3.26) 
(3.63) 
(3.90) 

(3.86) 

21.4 
23.3 
18.6 
19.4 

M  

ML  
MLP.  .  . 

405 
406 
407 
408 

0... 

80.9 
67.7 
67.4 
71.7 

39.7 
60.3 
62.8 
62.5 

16.4 
15.2 
14.6 
16.4 

38.2 
42.3 
38.8 
40.0 

38.7 
47.9 
48.3 
48.4 

73.4 
74.5 
83.6 

81.2 

.25 
.33 
.25 
.25 

28.2 
26.9 
28.0 

28.2 

R  

RL  
RLP.... 

409 
410 

RLPK.. 

0  

77.8 
67.1 

55.5 
52.3 

15.8 
14.5 

38.9 
34.7 

52.7 
40.7 

93.8 
58.3 

.18 
(2.30) 

22.7 
20.8 

Residues   only.     2No   manure,  phosphate,   or  potassium.     8No  manure.     4No 
manure  or  lime.    °No  treatment.    "Estimated. 


406 


BULLETIN  No.  219 


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1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL   EXPERIMENT   FIELDS 


407 


TABLE  2.— ALEDO  FIELD:    GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
6  crops 

Oats 
5  crops 

Wheat1 
4  crops 

Clover 
3  crops 

Soybeans 
1  crop 

1 
2 
3 

4 

0.. 

48.9 
59.1 
63.6 
65.8 

55.9 
61.6 
65.5 
63.6 

23.2 
28.9 
28.9 
30.8 

(2.19) 
(2.42) 
(2.89) 
(2.94) 

(1.38) 
(1.48) 
(1.52) 
(1.59) 

M  

ML    

MLP  

5 
6 

7 
8 

0  

51.8 
55.0 
59.3 
62.1 

59.8 
60.5 
63.9 
65.2 

28.2 
29.8 
30.0 
32.7 

.64 
.58 
.78 
.94 

19.8 
19.8 
22.5 
24.0 

R  

RL  

RLP  

9 
10 

RLPK. 

63.0 
54.3 

69.2 
56.6 

30.5 
25.2 

.56 

(1.82) 

24.8 

(1.44) 

0  

NOTE. — The   rotation   and   soil    treatment  are    both   standard,   as    described 
in  the  introduction. 

*No  manure  on  1914  wheat. 


TABLE  4.— ANTIOCH  FIELD:  GENERAL  SUMMARY 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
7  crops 

Oats 
4  crops 

Wheat 
3  crops 

Clover  seed 
2  crops 

1 
2 

0  

24.2 
21.8 

33.8 
29.3 

20.5 
17.3 

.50 
.30 

L  

3 
4 
5 

LN  

20.4 
31.2 

24.4 

30.7 
44.6 
30.0 

23.9 
37.8 
23.1 

.33 
1.08 
.57 

LP  

LK  

6 

7 
8 

LNP.  . 

34.6 
23.7 
35.6 

43.4 
27.9 
38.9 

30.1 
25.3 
33.6 

.57 
.59 
1.26 

LNK  

LPK  

9 
10 

LNPK  

39.2 
39.9 

42.4 
44.8 

29.8 
29.5 

.33 

.67 

NPK  

GENERAL  NOTES. — The  original  rotation  was  corn,  corn,  oats,  and  wheat. 
Nitrogen  was  supplied  in  800  pounds  of  dried  blood,  phosphorus  in  200  pounds  of 
steamed  bone  meal,  and  potassium  in  100  pounds  of  potassium  sulfate  per  acre  per 
annum.  Since  the  application  of  470  pounds  of  slacked  lime  in  1902,  no  further 
applications  were  made  until  1912.  In  1911  the  rotation  was  changed  to  corn,  oats, 
clover,  and  wheat  with  clover  seeding  on  the  nitrogen  plots.  The  soil  treatment 
remained  the  same  except  that  instead  of  applying  nitrogen,  all  crop  residues 
were  plowed  under,  and  an  application  of  4,000  pounds,  of  limestone  per  acre  was 
made  once  during  the  rotation. 


408 


BULLETIN  No.  219 


[May, 


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ILLINOIS  CROP  YIELDS   FROM   SOIL   EXPERIMENT   FIELDS 


TABLE  7.— CARLINVILLE  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE*;  MIDDLE  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1910 
Wheat1 

1911 
Corn 

1912 
Oats 

1913 

Soy- 
beans 

1914 
Wheat 

1915 
Corn 

1916 
Oats 

1917 
Sweet 
clover4 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0   . 

8.1 
9.3 
10.4 
12.9 

36.3 
42.9 
50.7 
52.7 

19.1 
23.8 
29.7 
32.2 

(1.45) 
(1.54) 
(1  .  79) 
(1.83) 

7.8 
10.4 
17.8 
19.6 

36.4 
47.7 
56.9 

58.6 

31.6 
40.6 

48.3 
50.5 

(0.0  ) 
(0.05) 
(1.76) 
(1.91) 

M    .  .  .. 

ML     . 

MLP.  .  . 

105 
106 
107 

108 

0  

9.1 
8.4 
8.8 
10.3 

38.0 
37.3 
45.7 
49.4 

20.3 
19.2 
26.9 

27.5 

13.0 
13.2 
15.8 
17.8 

8.4 
7.4 
12.8 
17.2 

36.6 
49.1 
68.0 
71.8 

30.6 
32.0 
49.5 
55.0 

R  

RL    

RLP.... 

109 
110 

RLPK  .  . 

0  

9.3 

6.8 

53.6 
40.8 

28.3 
19.1 

15.3 

(1.23)s 

15.6 
7.3 

75.2 
38.4 

46.1 
27.0 

(".17) 

Cow- 
peas2 

Wheat3 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

(   -65) 
(   .62) 
(   -74) 
(   .80) 

21.3 
23.6 
26.1 

27.8 

30.6 
41.4 
52.1 
46.0 

5.1 
2.3 
3.0 

2.8 

(1  -  20) 
(1.27) 
(1.50) 
(1.50) 

14.2 
19.7 
30.0 
28.0 

28.4 
39.9 
47.0 
49.3 

46.1 
62.2 
75.8 
76.2 

M  

ML  
MLP.... 

205 
206 
207 

208 

0   . 

(  -65) 

22.1 
20.4 
28.6 
30.3 

25.4 
28.7 
35.6 
39.6 

1.9 
1.9 
2.0 
2.3 

10.2 
10.4 
13.9 
14.8 

14.4 
16.7 
28.8 
30.0 

28.7 
30.8 
37.4 
37.8 

45.0 
51.9 
72.3 
77.0 

R    

RL      ... 

RLP.... 

239 
210 

RLPK  . 

32.7 

28.2 

44.7 
35.1 

3.8 
5.5 

12.9 

(1.37)" 

27.1 
18.6 

43.2 
32.8 

81.2 
46.2 

0  

(  -64) 

Oats2 

Clover3 

Wheat3 

Corn 

Oats 

Clover 

Wheat 

Corn 
39.2 
63  .8 
72.2 
71.3 
60.1 
65.3 
63.7 
66.6 

301 
302 
303 
304 

o 

32.5 
32.8 
46.4 
45.6 

(   -82) 
(   .79) 
(1.00) 
(1.30) 

7.3 
7.6 
10.0 
12.3 

21.1 

24.7 
32.4 
33.2 

1.9 
2.2 
4.1 
3.9 

(2.31) 
(2.45) 
(2.97) 
(2.12) 

5.0 
5.8 
9.4 
11.7 

M   

ML  

MLP.  .  . 

305 
303 
307 
308 

0 

45.6 
47.0 
46.6 
45.0 

(1.51) 
.17 
.33 
.33 

9.8 
8.2 
12.7 
14.3 

23.2 
16.4 
18.7 
18.3 

3.4 
3.9 
3.9 
4.5 

.50 
.58 
.50 
.50 

9.0 
8.0 
11.4 
13.7 

R  

RL  

RLP.... 

309 
310 

RLPK.. 
0  

40.6 
38.8 

.33 

(  .97) 

19.0 

18.8 

17.7 
25.0 

4.4 
3.1 

.25 

(1.95) 

18.2 
9.0 

71.8 
48.6 

Corn* 

Oats8 

Soy- 
beans3 

Wheat8 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0  

48.7 
49.6 
48.3 
52.0 

30.6 
21.1 
32.9 
34.7 

1.11 

(1.19) 
(1.29) 

(1.37) 

10.9 
7.2 

7.7 
9.6 

3.3 
6.6 
6.8 
7.2 

71.7 

74.7 
70.5 
70.2 

(1.17) 
(1.48) 
(1.71) 
(1.58) 

13  .2 
15.8 
23.4 
25.7 

M  

ML  
MLP.  .  . 

405 
406 
407 
408 

0  

49.5 
43.7 
38.1 

48.5 

38.4 
30.3 
31.7 
33.3 

11.3 
12.6 
13.2 
15.2 

7.7 
15.3 
7.2 
5.3 

2.5 
3.0 
5.5 
6.6 

68.8 
71.1 
69.1 
70.2 

2.75 
2.75 
3.17 
3.00 

19.8 
9.7 
14.8 
13.8 

R  

RL.  ... 

RLP.... 

409 
410 

RLPK.. 

0  

47.1 
45.6 

34.4 
33.8 

14.3 
11.5 

8.5 

8.7 

6.2 
3.5 

66.7 
69.1 

2.42 

(1.20) 

10.6 
15.6 

'The  soil  in  this  field,  especially  in  Series  100,  grades  toward  brown-gray 
silt  loam  on  tight  clay.  2No  manure  or  residues.  3No  manure.  4No  seed  pro- 
duced. "Estimated. 


410 


BULLETIN  No.  219 


[May, 


TABLE  6.— BLOOMINGTON  FIELD:  GENERAL  SUMMARY 


Seria! 
plot 
No. 

Soil  treatment  applied 

Average  annual  yields  —  bushels 
per  acre 

Corn 
7  crops 

Oats 
3  crops 

Wheat 
3  crops 

1 

2 

0... 

44.0 
41.8 

43.7 
51.7 

24.6 
22.4 

L  

3 

4 
5 

LR  

46.5 
58.1 
44.9 

50.0 
60.5 
47.9 

25.7 
45.2 
23.9 

LP  

LK  

G 

7 
8 

LRP  

61.5 
45.6 
62.8 

73.4 
50.7 
64.3 

50.4 
25.2 
43.9 

LRK  

LPK  

9 
10 

LRPK  

65.8 
59.7 

69.7 
57.2 

52.0 
50.4 

RPK. 

GENERAL  NOTES. — The  original  rotation  of  corn,  corn  oats,  wheat,  and  clover 
was  changed  in  1909  to  corn,  corn,  oats,  clover,  and  wheat  with  clover  seeding. 
Until  1905  nitrogen  was  applied  in  800  pounds  of  dried  blood  per  acre  per  an- 
num. Thereafter  crop  residues  were  substituted.  Phosphorus  is  applied  in  200 
pounds  of  steamed  bone  meal,  and  potassium  in  100  pounds  of  potassium  sulfate 
per  acre  per  annum.  Slacked  lime  at  the  rate  of  320  pounds  per  acre  was  applied 
in  1902  and  no  further  applications  were  made  until  1914,  when  an  application 
of  5,000  pounds  per  acre  was  made;  similar  applications  will  be  made  every  five 
years. 


TABLE  8.— CARLINVILLE  FIELD:  GENERAL  SUMMAET,  FULLY  TREATED  PLOTS 


iLE  FIELD:  GENERAL  SUMMAET,  FULLY  TREATED  PLOTS 

Average  annual  yields — bushels  or  (tons)  per  acre 
Corn  Oats  Wheat          Clover       Soybeans 

7  crops          6  crops         4  crops         3  crops         2  crops 


Serial 
plot 
No. 


Soil 

treatment 
applied 


0.... 
M... 
ML.. 
MLP. 


27.9 
38.1 
45.4 
45.5 


29.3 
34.3 
38.6 
39.3 


10.0 
12.9 
20.1 
21.2 


(1-16) 
(1.33) 
(2.14) 
(1.86) 


(1.32) 
(1.40) 
(1.64) 
(1.66) 


0.... 
R.  .  . 
RL.. 
RLP. 


30.6 
32.9 
39.2 
41.4 


28.3 
30.0 
37.3 
39.4 


12.9 
10.4 
17.0 
18.7 


1.08 
1.11 
1.22 
1.16 


11.6 
11.8 
14.9 
16.3 


9 
10 


RLPK, 
0.. 


44.6 
32.0 


38.4 
28.3 


17.9 
12.6 


(1.10) 


14.1 

(1.30) 


NOTE. — The  rotation  and  soil  treatment  are  standard,  as  described  in  the 
introduction. 


1919] 


411 


TABLE  9.— CARTHAGE  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  UPPER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1911 
Corn1 

1912 
Oats2 

1913 
Clover6 

1914 
Wheat6 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0   

39.4 
43.7 
38.5 
41.0 

31.4 
33.9 
33.3 
37.0 

(2.46) 
(2.64) 
(3.06) 
(3.02) 

18.8 
19.2 
22.9 
23.6 

35.9 
43.0 
40.0 
47.0 

20.3 
31.2 
32.8 
35.9 

(2.68) 
(2.53) 
(2.37) 
(2.54) 

M  

ML  

MLP.  .  . 

105 
106 
107 
108 

0.  . 

35.0 
30.7 
31.6 
31.2 

30.2 
24.4 
26.1 
26.3 

.67 
.67 
.50 
.50 

25.6 
24.7 
25.0 

27.7 

23.1 
23.4 
37.0 
45.0 

23.4 
25.0 
29.7 
34.4 

.67 
.67 
.58 
1.08 

!R.. 

RL  

RLP.  .  .  . 

109 
110 

RLPK  .  . 

0  

32.0 
36.5 

26.1 
31.4 

.50 

(3.64) 

28.3 

28.4 

47.6 
24.2 

40.6 
21.9 

.92 

(2.00) 

Wheat7 

Corn3 

Oats 

Clover 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

4.3 
4.9 
3.8 

4.7 

33.3 
38.8 
39.7 
40.8 

27.2 
30.0 
32.0 
33.9 

(1.14) 
(1.25) 
(1.52) 
(1.66) 

24.0 
26.7 
28.7 
30.1 

23.5 
27.9 
32.9 
29.1 

49.7 
51.7 

57.8 
66.9 

M     

ML  

MLP.  .  . 

205 
206 
207 
208 

0 

4.5 
4.4 
5.0 
5.4 

30.4 
42.3 
41.3 
55.4 

26.7 
22.5 
24.4 
27.5 

1.42 
1.42 
1.33 
1.50 

24.0 
30.8 
34.2 
38.0 

23.2 
23.4 
29.9 
27.6 

56.4 
67.0 
72.0 
66.1 

R  

RL  

RLP.  .  .  . 

209 
210 

RLPK.. 
0  

5.3 
4.5 

57.2 
28.2 

26.9 
25.0 

1.08 

(1.88) 

38.8 
31.2 

31.7 
20.6 

64.1 
40.9 

Soy- 
beans1 

Wheat4 

Corn 

Oats  ~ 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0.  . 

11.0 
10.3 
9.3 
11.3 

7.4 
3.6 
3.8 
5.3 

25.3 
26.1 
23.7 
34.8 

18.0 
15.6 
17.2 
17.0 

(2.40) 
(2.90) 
(2.99) 
(3.11) 

7.2 
12.5 
16.7 
22.5 

22.1 
26.5 
36.2 
41.4 

M  
ML  

MLP.  .. 

305 
306 
307 
308 

0.  . 

10.8 
10.8 
11.5 
10.3 

5.7 
4.3 
6.8 
5.5 

28.6 
47.8 
49.7 
49.1 

17.8 
23.4 
26.6 
23.6 

19.2 
21.7 
23.3 
29.7 

7.5 
8.3 
18.8 
20.0 

17.4 
54.2 
61.9 

67.8 

R  

RL...  .. 

RLP.... 

309 
310 

RLPK.. 
0  

10.7 
10.2 

7.1 
6.5 

51.3 

29.2 

24.2 
19.2 

26.7 

(2.39) 

25.0 
10.8 

66.1 
37.0 

Oats1 

Soy- 
beans8 

Wheat6 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0.  . 

12.7 
10.6 
14.8 
15.5 

20.6 
17.9 
19.6 
20.4 

24.0 
29.8 
29.1 
24.2 

24.6 
39.5 
40.8 
44.7 

30.6 
37.8 
48.4 
49.7 

(2  .  23) 
(1.88) 
(2.18) 
(2.72) 

18.8 
19.2 
18.9 
17.5 

M  

ML  
MLP.  .. 

405 
406 
407 
408 

0.  . 

12.8 
9.8 
13.3 
10.3 

16.9 
15.0 
14.6 
16.5 

21.0 
16.4 
24.2 
23.2 

26.4 
35.4 

47.2 
57.2 

30.3 
35.9 
54.7 
60.3 

.08 
.17 
.08 
.17 

16.7 
18.9 
21.7 
15.2 

R  

RL  

RLP.  .  .  . 

409 
410 

RLPK.. 
0  

11.3 
10.9 

16.3 
17.0 

23.2 
22.7 

58.3 
31.3 

59.4 
28.1 

.50 

(2.44) 

24.1 
16.0 

JNo  soil  treatment.     "Kesidues  only.     sNo  lime.     4No  manure  or  lime.     6No 
manure,  phosphate,  or  potassium.  6No  manure.     'Phosphorus  and  potassium  only. 


412 


BULLETIN  No.  219 


[May, 


TABLE  11. — CLAYTON  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  UPPER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1911 
Corn1 

1912 
Oats2 

1913 
Soy- 
beans5 

1914 
Wheat8 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0   

45.8 
50.0 
52.4 
48.7 

43.0 
42.3 
39.3 
46.9 

10.3 

(1.49) 
(1.58) 
(1.50) 

5.0 
4.8 
5.3 
5.4 

23.3 
27.3 
28.6 
31.5 

19.2 
21.6 
20.8 
23.0 

(2.01) 
(2.51) 
(3.26) 
(3.55) 

M   

ML  

MLP.  .  . 

105 
106 
107 
108 

0  

54.6 
56.5 
57.6 
55.5 

44.1 
40.0 
41.6 
42.3 

12.1 
12.5 
13.5 
13.0 

6.2 
8.5 
6.8 

8.8 

25.6 
36.0 
55.4 
55.2 

20.3 
20.2 
31.4 
38.6 

1.92 
2.17 
2.17 
2.00 

R  

RL  

RLP.... 

109 
110 

RLPK.. 
0  

52.0 
54.0 

43.8 
50.0 

11.8 
12.7 

7.9 

7.5 

56.5 
27.3 

35.9 
25.9 

2.00 

(2.94) 

Oats1 

Corn8 

Oats 

Soy- 
beans 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

19.5 
19.1 
16.9 
20.9 

35.4 

47.4 
36.9 
56.8 

45.5 
55.3 
51.6 
56.1 

(1.28) 
(1.41) 
(1.38) 
(1.45) 

11.2 
17.9 
14.5 
23.2 

17.1 
21.4 
21.5 
21.0 

63.8 
71.6 
70.6 
72.3 

M  

ML  

MLP... 

205 
206 
207 
208 

0.  . 

18.9 
18.1 
18.9 
20.9 

38.7 
52.1 
50.5 
54.4 

45.9 
45.9 
48.3 
52.2 

14.2 
16.7 
18.3 
19.6 

7.0 

16.2 
16.1 
30.2 

15.2 
26.7 
26.8 
26.9 

65.9 
69.8 
82.8 
77.5 

R  

RL  

RLP.... 

209 
210 

RLPK.. 
0  

17.5 
25.0 

55.5 
36.2 

47.7 
45.5 

17.1 
(1.40)7 

29.2 
14.8 

24.6 
15.1 

83.6 
65.9 

Soy- 
beans1 

Barley4 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0.  . 

12.0 
12.5 
13.0 

12.8 

19.6 
19.7 
20.2 
22.6 

35.4 
55.2 
55.1 

58.4 

10.0 
14.7 
13.3 
15.9 

(2.52) 
(2.58) 
(2.83) 
(3.11) 

1.6 
2.0 
3.9 
4.6 

30.4 
52.8 
61.2 
60.5 

M  

ML  

MLP... 

305 
306 
307 
308 

0.  . 

14.6 
14.4 
14.8 
14.8 

21.5 
21.4 
22.2 
24.5 

42.1 
49.7 
52.2 
55.1 

13.9 
17.3 
16.6 

18.4 

12.5 
12.5 
19.2 
19.6 

1.8 
4.4 
5.6 
7.5 

35.2 
52.6 
59.9 
65.6 

R  

RL  

RLP.... 

309 
310 

RLPK.. 

0  

14.8 
13.8 

30.8 
18.9 

52.6 
43.6 

16.9 
14.7 

22.5 

(2.21) 

9.0 
1.7 

64.0 
20.3 

Oats1 

Soy- 
beans2 

Wheat6 

Corn 

Oats 

Clover 

Wheat 

401 

402 
403 
404 

0.. 

27.0 
32.2 
30.0 
30.8 

16.4 
(1.36) 
(1.36) 
(1.36) 

32.9 
31.0 
31.6 
34.0 

36.0 
37.8 
48.7 
46.1 

58.1 
61.6 
64.5 
69.5 

(2.30) 
(2.77) 
(2.76) 
(2.51) 

18.0 
21.7 
21.6 
23.5 

M  

ML  
MLP.  .  . 

405 
406 
407 
408 

0.  . 

32.8 
33.3 
33.3 
39.3 

17.5 
16.7 
16.9 
17.2 

34.1 
33.3 
33.8 
37.0 

29.9 
30.4 
41.6 
31.9 

60.5 
50.5 
62.5 
68.0 

1.83 
1.58 
1.00 
1.00 

20.4 
26.7 
21.5 
23.2 

R  

RL  

RLP.  .  .  . 

409 
410 

RLPK.. 

0.  . 

34.7 
35.6 

16.3 
17.5 

37.3 
35.0 

45.5 
34.8 

65.6 

62.2 

1.25 

(2.15} 

24.7 
Ifi  0 

*No  treatment.    2Besiducs  only.    "No  lime.    4No  manure  or  lime, 
phosphate  or  potassium.     *No  manure.     'Estimated. 


5No  manure, 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


413 


TABLE  10. — CARTHAGE  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
5  crops 

Wheat1 
4  crops 

Clover 
3  crops 

Soybeins 
1  crop 

1 

2 
3 

4 

0.  . 

26.3 
32.6 
34.7 
39.4 

29.2 
33.3 
37.6 
40.7 

17.2 
19.4 
21.8 
23.4 

(2.02) 
(1.89) 
(2.02) 
(2.31) 

(2.40) 
(2.90) 
(2.99) 
(3.11) 

M  

ML                

MLP  

5 
6 
7 
8 

0  

23.4 
36.8 
45.1 
49.3 

30.9 
34.8 
41.5 
42.4 

18.4 
20.7 
24.9 
25.2 

.72 
.75 
.66 
.92 

19.2 
21.7 
23.3 

29.7 

R  

RL  

RLP  

9 
10 

RLPK  .  .  . 

51.0 

28.5 

43.0 
27.0 

29.0 
21.6 

.83 
(2.11) 

26.7 
(2.39) 

0  

NOTE. — The   rotation   and   soil  treatment  are  standard,  as  described  in  the  in- 
troduction. 

'No  manure  on  1914  wheat. 


TABLE  12.— CLAYTON  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
5  crops 

Wheat1 
4  crops 

Clover 
2  crops 

Soybeans 
2  crops 

1 

2 
3 
4 

0         .    . 

28.4 
38.9 
43.0 
43.5 

39.3 
45.0 
44.2 
47.4 

9.0 
11.6 
11.3 
14.2 

(2.16) 
(2.64) 
(3.01) 
(3  .  03) 

(1.90) 
(2.00) 
(2.10) 
(2.28) 

M  

ML  

MLP  

5 

6 

7 
8 

0.  . 

29.6 
39.1 
47.2 
46.9 

41.3 
40.7 
48.3 
50.9 

8.9 
14.0 
12.5 
17.4 

1.88 
1.88 
1.59 
1.50 

13.3 
14.6 

18.8 
19.6 

R  

RL  

RLP  

9 
10 

RLPK  

48.7 
28.2 

49.9 

42.8 

17.7 
10.0 

1.62 

(2.54) 

19.8 
(1.80) 

0  

NOTE. — The  rotation   and  soil   treatment  are  standard,  as  described  in  the  in- 
troduction. 

JNo  manure  on  1914  wheat. 


414 


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BULLETIN   No. 


[May, 


TABLE  14.— CUTLER  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED   PLOTS 


riot 

No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
4  crops 

Oats 
2  crops 

Wheat 
4  crops 

Clover 
3  crops1 

98 
99 
100 

RL(bP)K  

35.4 
36.0 

42.2 

27.1 
28.8 
24.6 

29.0 
33.1 
30.7 

1.75 

1.81 
2  36 

RL(aP)K     

RL(rP)K  

101 

102 

0.  . 

27.7 
29.2 

17.1 
23.0 

10.0 
16.9 

(   -64) 
(1.00) 

L  

103 
104 
105 

RL  

26.9 
23.7 
36.9 

25.6 
24.6  • 
25.5 

18.6 
25.1 
21.3 

1.84 
(1.17) 
(1.14) 

LP  

LK  

lOo 
107 
108 

RLP 

24.3 
38.4 
44.0 

27.4 
31.6 
29.1 

25.6 
21.3 
31.2 

2.33 
2.48 
(1.69) 

RLK  

LPK  

109 
110 

RLPK  

41.1 
33.9 

32.2 
29.1 

29.8 
24.9 

2.87 
3.11 

RPK  

111 

112 

L(aP)K  

37.1 
37.3 

31.8 
29.3 

31.7 
24.4 

(1.47) 
(1.28) 

L(rP)K  

Plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
14  crops 

Wheat 
15  crops 

Cowpeas  or 
soybeans 
13  crops2 

2Ul 
202 
203 
204 
205 

J    

17.4 
22.5 
30.4 
33.0 
39.5 

7.0 
7.8 
10.3 
14.1 
15.8 

(0.59) 
5.1 

(  -83) 
7.5 
(1.14) 

.... 

R  

M  

RL  

ML  

206 
207 
208 
209 
210 

RLP.  . 

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38.5 
46.4 
42.6 
36.5 

18.1 
18.5 
20.1 
20.2 
17.8 

7.9 
(1.18) 
10.5 
(1.21) 
(1.41) 

MLP  

RLPK  

MLPK  

LPK  

'First  crop  all  hay.        21908  seed  only. 


1919] 


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1919] 


ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


419 


TABLE  16.— DEKALB  FIELD:  GENERAL  SUMMARY 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
36  crops 

Oats 
27  crops 

Wheat 
9  crops 

Clover 
20  crops 

3 
6 
9 

RP.  .  . 

52.8 
56.2 
49.7 

51.3 
52.0 
50.7 

31.3 
35.0 
28.4 

.841 
.861 
.841 

RP  

R  

10 
13 
16 

M.  . 

56.5 
.  57.4 
54.4 

52.4 
55.5 
53.2 

32.1 
36.3 
36.1 

(1.73) 
(2.06) 
(2.03) 

MP  

MP  

GENERAL  NOTES. — Two  different  rotations  are  practiced  upon  this  field.  On 
each  series  a  rotation  of  corn,  corn,  oats,  and  clover  is  grown  upon  Plots  3  to  16, 
and  corn,  oats,  wheat,  and  clover  on  Plots  23  to  36.  The  soil  treatment  as  indicated 
is  standard,  as  described  in  the  introduction. 

'First  four  crops  harvested  as  hay. 


420 


BULLETIN  No.  219 


[May, 


TABLE  17.— DIXON  FIELD:  MAIN  ROTATION:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM   PRAIRIE;    IOWAV   GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

19101 
Barley 

1911 
Corn2 

1912 
Oats4 

1913 
Clover4 

1914 
Wheat6 

1915 
Corn 

1916 
Oats 

1917 
Soy- 
beans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

105 
106 
107 
108 

0.  . 

20.5 
20.8 
24.4 
24.7 

5tf.4 
62.8 
60.5 
64.7 

35.2 
39.8 
47.2 
42.2 

(3.14) 
(3.32) 
(3.47) 
(3.56) 

24.8 
25.3 
26.6 
33.5 

5.6 
32.9 
38.1 
41.7 

72.0 
70.8 
79.2 
81.6 

(1.62) 
(1.82) 
(2.25) 
(2.40) 
10.8 
9.1 
10.8 
11.0 
10.3 
(1.28) 

M  

ML     .    . 

MLP.  .  .  . 

0  

26.8 
24.9 
24.4 
22.3 

64.3 
65.9 
67.5 
68.2 

47.8 
50.0 
49.5 
44.5 

1.00 
1.25 
1.00 
1.00 

32.8 
37.7 
34.2 
37.9 

18.5 
24.4 
29.0 
33.0 

76.6 
78.8 
81.2 
83.4 

R  

RL     

RLP   .  .  . 

109 
110 

RLPK.  .  . 
0   

20.8 
21.6 

69.2 
65.0 

49.4 
43.3 

.75 
(2.96) 

35.2 

24.9 

32.6 
2.4 

78.1 
69.7 

Clover 

Wheat" 

Corn 

Oats 

Clover 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

(1.69) 
(1.56) 
(1.54) 
(1.87) 

31.9 
31.0 
33.8 
37.4 

3.3 
12.9 
11.4 

26.2 

49.2 
55.6 

52.7 

58.4 

(1.76) 
(2.13) 
(2.54) 
(2.77) 

27.9 
28.2 
29.2 
34.0 

37.8 
44.5 

49.5 

52.8 

68.4 
82.3 
85.6 
93.0 

M  

ML  

MLP.  .  .  . 

205 
206 
207 
208 

0  : 

(1.87) 

30.5 
37.9 
30.7 
41.0 

21.1 
37.5 
34.2 
42.2 

58.9 
58.4 
52.7 
58.6 

1.17" 
1.42 

1.58 
2.17 

28.0 
31.3 
30.0 
36.8 

43.4 
44.3 
48.5 
50.4 

76.1 

77.7 
77.7 
85.9 

R     

RL    

RLP.... 

209 
210 

RLPK... 

0   

(1.80) 

41.6 
30.6 

61.5 
20.4 

56.1 
52.3 

2.00 
1.83" 

34.6 
25.1 

49.4 
40.9 

84.4 
68.1 

Oats» 

Soy- 
beans3 

Bar- 
ley5 

Corn 

Oats 

Clover 

Wheat 

Corn 

301 
302 
303 
304 

0.  . 

50.0 
56.9 
57.3 
54.5 

14.5 
12.8 
16.7 
16.0 

17.2 
30.6 
27.0 
32.5 

35.5 
56.6 
60.4 
55.3 

54.7 
60.6 
61.1 
60.6 

(1.35) 
(3.38) 
(3.41) 
(3.57) 

7.2 
9.2 
11.6 

18.2 

24.9 
55.3 
57.2 
60.7 

M  

ML  

MLP.... 

305 
306 
307 
308 

0  

56.1 
56.7 

48.9 
49.5 

17.9 
15.3 
18.1 
17.9 

27.6 
37.7 
31.2 
37.5 

42.5 
47.5 
48.3 
49.2 

60.0 
59.8 
56.2 
54.2 

.42 
.58 
.58 
.50 

12.2 
16.2 
14.9 
21.1 

26.6 
40.6 
38.7 
45.5 

R  

RL  

RLP    .  .  . 

309 
310 

RLPK.  .  . 
0  

51.6 
48.1 

19.1 
15.4 

40.6 

27.8 

53.4 
44.4 

58.0 

58.8 

.42 

(2.50) 

22.1 
10.6 

46.4 
29.4 

40T 
402 
403 
404 

Corn 

Oats2 

Soy- 
beans4 

Wheat5 

Corn 

Oats 

Clover 

Wheat 

0.  . 

35.8 
40.3 
41.3 
41.3 

47.8 
48.3 
53.8 
48.4 

(1.60) 
(1.73) 
(1.74) 
(1.63) 

16.2 
18.2 
17.6 

23.7 

43.9 
66.8 
68.8 
66.1 

65.5 
70.5 
58.6 
54.2 

(2.69) 
(2.97) 
(3.  Ob) 
(3.03) 

25.5 
26.2 
27.5 

27.8 

M  

ML  

MLP.  .  .  . 

405 
406 
407 
408 

0  

42.2 
39.2 
40.0 
39.0 

48.4 
49.7 
42.3 
47.0 

12.3 
12.4 
15.0 
14.0 

18.8 
21.0 
20.7 
23.8 

49.1 
58.8 
61.3 
55.4 

73.9 
68.6 
58.6 
58.9 

.05 
.03 
.04 
.06 

24.8 
26.8 
30.7 
31.8 

R  

RL  

RLP  

409 
410 

RLPK.  .  . 
0  

35.2 
43.0 

47.8 
48.0 

13.8 

(1.50) 

23.0 
15.0 

59.1 
49.0 

52.5 

72.7 

.05 

(2.85) 

35.8 
25.7 

*No  soil  treatment  in  1910.  "Residues  only.  3No  manure  or  lime.  4No 
manure,  phosphate,  or  potassium.  BNo  manure.  'Yields  from  Plots  5  and  10 
interchanged. 


1910] 


ILLINOIS  CROP  YIKLDS   FROM   SOIL  EXPERIMENT   FIELDS. 


421 


TABLE  18.— DIXON  FIELD:  MAIN  ROTATION :  GENERAL  SUMMARY 
FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
6  crops 

Oats 
5  crops 

Wheat1 
4  crops 

Clover 
3  crops 

1 

2 
3 
4 

0    

25.2 
44.8 
47.6 
50.5 

62.0 
68.0 
67.4 
69.6 

21.3 
22.2 
23.7 

28.4 

(1.93) 
(2.82) 
(3  .  00) 
(3.12) 

M  

ML  

MLP  

5 
0 

7 
8 

0  

33.5 

42.2 
43.3 
46.0 

69.1 
68.7 
65.3 

68.2 

24.2 
28.0 
27.4 
31.9 

.55 
.67 
.73 
.91 

R  

RL  

RLP  

0 

10 

RLPK  

50.4 
31.1 

65.8 
64.3 

31.9 
21.6 

.82 
(2.39) 

0  

NOTE. — The  rotation   and   soil  treatment   are  standard,   as   described   in  the 
introduction. 

*No  manure  on  1914  wheat. 


422 


BULLETIN  No.  219 


[May, 


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ILLINOIS  CROP  YIELDS   FROM   SOIL   EXPERIMENT   FIELDS 


423 


TABLE  20.—  DUBOIS  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY,  PRAIRIE;  LOWER  ILLINOISAN  GLACIATION 

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424 


BULLETIN  No.  219 


[May, 


TABLE  21.— DUBOIS  FIELD:  GENERAL  SUMMARY 


Plot 
No. 

Soil 

treatment  applied 

Average  annual  yields  —  bushels  per  acre 

Corn 
4  crops 

Oats 
4  crops 

Wheat 
4  crops 

Land  Not  Tile-drained 


101 

0  

15.9 

15.0 

4.7 

102 

L  

17.4 

26.1 

10.3 

103 

LR.  . 

20.1 

33.6 

14.6 

104 

LP   

18.1 

40.8 

24.5 

105 

LK  

31.9 

35.0 

19.3 

106 

LRP 

18.0 

38.8 

30.6 

107 

LRK  

29.7 

36.8 

22.4 

108 

LPK  

33.9 

42.5 

30  9 

109 

LRPK.. 

32.7 

41.1 

31.8 

110 

RPK  

27  3 

30.7 

20.6 

Land  Tile-drained 


111 

0  

15.5 

15.3 

6.4 

112 

L  

16.9 

24.4 

15.9 

113 

LR  '  

18.6 

31.1 

18.7 

114 

LP  

15.0 

36.1 

26.5 

115 

LK  

29.6 

37.2 

17.4 

116 

LRP. 

19.8 

44.5 

33.1 

117 

LRK  

33.1 

37.2 

27.3 

118 

LPK  ...  

37.0 

39.7 

32.0 

119 

LRPK 

35  5 

37.7 

31.5 

120 

RPK  

30.7 

35.5 

20.6 

GENERAL  NOTES. — The  original  rotation  of  corn,  oats,  wheat,  clover  was 
changed  in  1911  to  corn,  oats,  clover,  and  wheat  with  legume  seeding.  Until  1905 
the  nitrogen  was  supplied  in  800  pounds  of  dried  blood  per  acre  per  year;  there- 
after all  crop  residues  were  returned  to  the  land.  The  phosphorus  has  been  applied 
in  200  pounds  of  steamed  bone  meal  and  potassium  in  100  pounds  of  potassium 
sulfate  per  acre  per  year. 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


425 


TABLE  22. — ENFIELD  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
YELLOW-GRAY  Silt  LOAM,   TIMBER  SOIL;  LOWER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1913 

Cowp^as1 

1914 

Wheat3 

1915 
Corn 

1916 

Oats 

1917 

Soybeans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0             

(   .19) 
(   .16) 
(   .13) 
(   .09) 

8.2 
9.6 
8.3 
13.2 

23.2 
38.9 

45.8 
50.4 

13.3 
16.6 
19.4 
17  2 

(   .99) 
(1.14) 
(1.62) 
(1.96) 

M    

ML    

MLP  

105 
106 
107 
108 

0  

(.10) 

7.0 
8.0 
11.4 
16.2 

28.8 
32.8 
45.2 
48.4 

9.1 
8.3 
14.1 
14.4 

5.0 
5.0 
13.5 
15.6 

R  

RL  

RLP  

109 
110 

RLPK 

18.6 
13.2 

44.8 
38.5 

18.3 
9.7 

15.0 

(1.22) 

0  

(   .22) 

Oats1 

Soybeans8 

Wheat3 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

3.1 

3.8 
4.2 
4.4 

(   -57) 
(   -60) 
(   -77) 
(   -86) 

10.1 
12.8 
13.7 
23.6 

26.6 
37.1 
49.3 
53.6 

20.0 
27.5 
35.3 
37.5 

M  

ML  

MLP  

205 
206 
207 
208 

0.  . 

2.3 
3.0 
4.1 
3.8 

4.8 
4.8 
4.8 
4.9 

7.8 
13.8 
15.2 
21.1 

30.3 
35.2 
50.1 
52.5 

22.0 
20.0 
36.2 
40.3 

R   . 

RL 

RLP  

209 
210 

RLPK 

5.0 

7.8 

4.8 
(   .76) 

22.0 
20.1 

54.8 
42.0 

44.4 
25.2 

0  

Corn3 

Oats 

Soybeans 

Wheat 

Corn 

301 
302 
303 
304 

0 

19.0 
19.6 
26.5 
30.9 

2.8 
3.0 
3.3 
3.4 

(".07) 
(  -19) 
(  -09) 

.9. 
2.0 
8.4 
11.0 

13.6 
14.4 
44.2 
46.8 

M  

ML  

MLP  

305 
306 
307 
308 

0  

21.4 
23.7 
29.3 
26.2 

1.1 
1.3 
1.6 
1.1 

1.8 
2.0 
5.7 
15.8 

20.3 
26.3 
69.8 
69.6 

R  

RL  

RLP  

309 
310 

RLPK  

21.8 
17.3 

1.3 

.8 

11.7 
3.4 

74.0 
36.9 

0  

Wheat3 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0   . 

13.0 
5.4 
6.5 

5.7 

24.3 
28.5 
32.6 
32.4 

24.7 
22.5 
33.3 
30.9 

(   -52) 
(   -35) 
(1.66) 
(1.43) 

8.3 
6.2 
28.2 
23.2 

M  

ML  

MLP  

405 
406 
407 
408 

0.  . 

3.7 
7.1 
7.2 
9.8 

19.3 
11.1 

14.4 
14.7 

20.3 
24.4 
28.6 
33.4 

0.00 
.33 

1.58 
1.75 

4.2 
8.2 
23.2 
32.1 

R  

RL  

RLP  

409 
410 

RLPK.. 

14.8 
7.1 

20.5 
19.8 

36.4 
30.8 

1.42 

(  .49) 

31.3 
5.0 

0  

*No  manure  or  residues.     2No  residues.     3No  manure. 


426 


BULLETIN  No.  219 


[May, 


TABLE  24.— EWING  FIELD:  CROP  YIELDS  INT  SOIL  EXPERIMENTS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY,  PRAIRIE;  LOWER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1910 
Wheat1 

1911 
Corn 

1912 

Oats 

1913 
Clover 

1914 
Wheat 

1915 
Corn 

1916 
Oats 

1917 
Soy- 
beans 

Bushels  or  (tons)  per  acre 

101 

102 
103 
104 

0.  . 

10.4 
14.2 
9.9 
8.0 

16.2 
26.8 
27.5 
30.2 

12.0 
19.1 

28.3 
34.4 

(   -20) 

(   .24) 
(   -40) 

(   .81) 

1.7 
3.4 
16.2 
22.5 

24.1 
38.1 
60.7 
57.4 

5.0 
9.4 
19.7 
21.9 

(   .51) 
(   .61) 
(1.00) 
(1.26) 

M  

ML  

MLP.  .  .  . 

105 
106 
107 
108 

0  

6.8 
8.6 
8.5 
10.7 

12.7 
13.2 
23.0 
20.8 

14.4 
16.4 
30.8 
33.4 

0 
0 
.50 
1.08 

.9 
.8 
12.8 
17.6 

17.7 
15.0 
46.7 
42.5 

3.8 
4.8 
11.2 
14.2 

2.0 
1.8 
9.6 
10.7 

R     .  .    .  . 

RL.   ... 

RLP.  .  .. 

109 
110 

RLPK.  .  . 
0  

17.9 
9.7 

26.0 
15.8 

37.2 
11.4 

.75 
(   .31) 

25.8 
1.2 

56.4 
23.4 

22.5 
4.7 

12.6 
(   -66) 

Cow- 
peas1 

Wheat* 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

Oat  3 

201 
202 
203 
204 

0.  . 

(   .89) 
(   .97) 
(1.05) 
(1.19) 

10.7 
12.8 
17.3 
23.8 

24.7 
39.8 
52.1 
50.7 

1.7 
3.9 
7.3 
6.9 

(   .27) 
(   .23) 
(   .47) 
(   .53) 

5.3 
8.2 
18.1 
23.6 

21.4 

40.1 
57.0 
58.6 

18.3 
25.2 
37.0 
40.9 

M  

ML   .    . 

MLP.... 

205 
206 
207 
208 

0.  . 

(1.02) 

11.9 
9.9 
20.5 
23.7 

30.7 
33.1 
48.3 
45.0 

.6 
2.5 

8.4 
9.2 

2.0° 
2.3 
4.0 
4.0 

4.9 
4.9 
19.1 
17.7 

24.3 
19.6 
51.5 
51.6 

17.5 

18.8 
34.7 
36.6 
47.0 
18.1 

R  

RL  

RLP.  ... 

209 
210 

RLPK... 

0  

(".87) 

28.1 
12.0 

51.6 
31.7 

12.5 
3.3 

4.2 
(.32)* 

27.8 
4.2 

64.0 
31.1 

Oats1 

Cow- 
peas2 

Wheat2 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0.  . 

37.1 
43.1 
42.6 
45.3 

(   .25) 
(   -23) 
(  .34) 
(   -38) 

1.8 
2.3 
4.9 
3.0 

6.0 
10.3 
20.8 
23.9 

3.0 
3.4 
5.6 

6.4 

2.0 
1.8 
6.6 

7.7 

.3 

.4 
5.6 
6.8 

6.4 
24.4 
54.1 
58.9 

M  

ML  

MLP.  .  .  . 

305 
306 
307 
308 

0.  . 

32.8 
37.8 
39.2 
35.6 

1.6 
1.2 
2.4 
3.2 

.8 
.8 
4.3 
3.2 

5.6 
6.2 
22.5 
21.8 

1.4 
3.3 
5.9 
5.3 

1.7 
2.5 
7.5 
6.4 

.2 

.2 
7.4 
4.8 

12.6 
17.1 
35.7 
45.9 

R  

RL  

RLP.... 

309 
310 

RLPK.  .  . 
0  

36.7 
44.2 

4.0 
(.25)4 

4.3 

2.8 

26.8 
6.1 

6.6 
1.4 

8.2 
3.8 

6.9 
.5 

63.8 
13.1 

Corn1 

Oats2 

Cow- 
peas3 

Wheat2 

Corn 

Oats 

Clover 

Oats8 

401 
402 
403 
404 

0.  . 

30.8 
35.1 
36.4 
40.4 

17.7 
29.2 
31.3 
32.0 

(  .76) 
(   .66) 
(1.26) 
(1.38) 

.8 
.8 
11.8 
11.3 

4.3 
4.5 
7.6 
6.3 

9.7 
16.9 
37.5 
49.4 

(  -35) 
(   .46) 
(1.66) 
(1.94) 

15.5 
15.3 
39.4 

47.3 

M  

ML  

MLP.  .  .  . 

405 
406 
407 
408 
409 
410 

0.  . 

37.3 

38.4 
51.7 
50.7 

23.9 
21.8 
42.7 
36.7 

.90 

.9 
1.1 
16.0 
14.9 

3.5 
2.7 
3.1 
3.6 

12.3 
13.8 
43.9 
44.5 

00 
00 
1.25 
1.58 

22.5 
27.3 
58.1 
62.8 

R  

RL  

RLP.  ... 

RLPK.  .  . 
0  

47.6 
43.6 

42.8 
23.9 

("  b  ) 

27.2 
25 

6.4 
2.7 

45.3 
16.2 

1.58 

(   -47) 

65.5 
32.3 

*No   manure  or   residues.     "No   manure. 
6Yielda  from  Plots  5  and  10  interchanged. 


"Wheat  winter-killed.     4Estimated. 


1910] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


427 


TABLE  23. — ENFIELD  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 

No. 

Soil  treatment  applied 

Average  annual  yield  —  bushels 
per  acre 

Corn 
4  crops 

Oats 
4  crops 

Wheat1 
4  crops 

1 
2 
3 

4 

0.  . 

21.9 
29.7 
43.0 
45.8 

15  2 
17  4 

22.8 
22.2 

6.9 
7.7 
14.7 
17.8 

M  

ML  

MLP  

5 
6 

7 
8 

0  

24.7 
26.3 
44.9 
46.3 

13.1 
13.5 
20.1 
22.3 

5.2 
8.0 
13.9 
21.3 

R    

RL  

RLP  

9 
10 

RLPK  

48.5 
34.3 

25.1 
16.6 

20.9 
10.4 

0  

NOTE. — The  rotation  and  soil  treatment  are  standard,  as  described  in  the 
introduction. 

''No  manure  on  1914  and  1915  wheat. 


TABLE  25. — EWING  FIELD:  GENERAL  S.UMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
7  crops 

Oats 
7  crops 

Wheat 
3  crops 

Clover 
2  crops 

Soybeans 
3  crops 

1 
2 
3 

4 

0 

14.7 
26.3 
40.0 
40.9 

9.3 
17.7 
25.0 
29.6 

2.4 
4.0 
13.3 
17.6 

(  -28) 
(  -35) 
(1.03) 
(1.38) 

(  -33) 
(  -34) 

(  -71) 
(  -85) 

M  

ML  

MLP  

5 
6 

7 
8 

0.  . 

15.3 
15.3 
33.0 
33.0 

10.4 
12.4 
27.6 
29.4 

2.0 
2.0 
13.1 
13.4 

.10 
.00 
.89 
1.33 

1.9 
2.2 
7.0 
7.0 

R  

RL  

RLP  

9 
10 

RLPK  .  . 

42.1 
17.7 

33.8 
12.5 

20.2 
2.0 

1.17 
(   .39) 

8.3 

(  .45) 

0.. 

NOTE. — The  crop  rotation  and  soil  treatment  are  standard,  as  described  in 
the  introduction. 


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ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


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430 


BULLETIN  No.  219 


[May, 


TABLE  27.— FAIRFIELD  FIELD:  GENERAL  SUMMARY 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
13  crops 

Wheat 
11  crops 

Clover 

7  crops1 

Soybeans 
or  cowpeas 
19  crops2 

Oats 
1  crop 

Land  Tile-drained 


3 

RLP  

30  0 

15  1 

56 

10  7 

37  5 

6 

RLP  

31.8 

14.2 

.58 

11.6 

34.2 

9 

R  

20.  93 

5.4 

.22 

8.3 

25.8 

10 

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30.7 

6.7 

(   .47) 

(  -81) 

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3 

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20  9 

(1.65) 

(1.17) 

32  2 

6 

MLP.  . 

40.2 

20.8 

(1.60) 

(1.23) 

44.4 

Land  Not  Tile-drained 


3 

RLP  

31.9 

15.0 

.75 

10.6 

33  6 

6 

RPL  

27.6 

12.6 

.82 

9  7 

37  8 

9 

R  

17.7 

2.5 

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6.0 

29.9 

10 

M 

25  1 

4  2 

(     50) 

(    65) 

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3 

MLP  

34.6 

16.6 

(1.52) 

(1  .  13) 

32  5 

6 

MLP  

36.7 

17.2 

(1.57) 

(1.16) 

47.5 

GENERAL  NOTES. — The  Fairfield  field  is  operated  primarily  for  the  investiga- 
tion of  crop  problems.  There  are,  however,  standard  plots  on  all  series  on  which 
manures,  phosphate,  and  limestone  are  applied,  as  described  in  the  introduction. 
The  rotation  consists  of  corn,  cowpeas  or  soybeans,  wheat,  and  clover.  Cow- 
peas  or  soybeans  are  substituted  in  case  of  clover  failure,  and  oats'  are  substituted 
when  wheat  fails. 

1Six  crops  in  residue  system. 

"Eighteen  crops  in  manure  system. 

•Corn  yields  from  Plot  129  are  substituted  for  those  from  abnormal  Plot 
109  in  making  this  average. 


1919} 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


431 


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432 


BULLETIN  No.  219 


[May, 


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ININIMCNIM 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


433 


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434 


BULLETIN  No.  219 


[May, 


TABLE  29. — GALESBURG  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Averaee  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
10  crops 

Oats 
4  crops 

Wheat 
3  crops 

Clover 
4  crops 

Soy- 
beans 
4  crops 

Barley 
1  crop 

1 
2 
3 

4 
5 

L 

49.1 
58.2 
67.8 
68.0 
56.2 

43.4 
45.8 
47.6 
48.5 
46.5 

20.8 
24.6 
25.8 
25.4 
23.5 

(2.11) 

(2  .'67) 
(2.45) 
(2.37) 

(1.16) 
13.8 

(1.56) 
(1.54) 
(1.27) 

22.5 
27.1 
25.5 
25.6 
21.7 

RL  

ML  

CvML  

L  

6 
7 
8 
9 
10 

LP.  .  . 

63.8 
66.2 
65.0 
70.0 
52.9 

51.2 
51.6 
50.6 
49.8 
42.5 

32.0 
32.1 
28.8 
30.6 
21.8 

(2.86) 

(2!  90) 
(2.91) 
(1.94)1 

14.1 
15.6 

(1.65) 
(1.63) 
12.7 

24.2 
29.8 
26.8 
33.0 
23.0 

RLP  

MLP  

CvMLP  

L  

11 
12 
13 
14 
15 

LPK.  . 

65.4 
68.2 
68.0 
70.6 
51.7 

48.0 
48.7 
48.6 
46.8 
40.4 

31.2 
31.1 
30.1 
29.7 
17.9 

(3.03) 

(siii) 

(3.27) 
(2.08) 

15.5 
15.9 

(1-75) 
(1.67) 
(1.31) 

22.7 
38.4 
29.7 
35.1 
25.5 

RLPK  

MLPK  

CvMLPK  

L  

16 
17 
18 
19 
20 

R  f  

55.2 
62.9 
66.8 
69.7 
54.5 

41.5 
49.8 
53.8 
51.5 
40.4 

21.2 
33.0 
36.9 
33.9 
23.9 

(i'82) 

12.5 
14.2 
14.3 
17.4 

(1.14) 

33.3 
31.5 
32.6 
39.1 
24.9 

RP  

RPK  

RLNPK.  

0  

GENERAL  NOTES. — The  original  rotation  was  corn,  corn,  oats,  wheat,  clover, 
and  timothy.  In  1909  this  was  changed  to  corn,  corn,  oats,  clover,  wheat,  and 
clover.  The  phosphorus  has  been  applied  in  rock  phosphate  at  the  rate  of 
500  pounds  per  acre  per  year.  At  the  beginning,  an  application  of  1,300  pounds 
of  limestone  was  made  per  acre;  no  more  limestone  was  applied  until  1913,  when 
an  application  of  4  tons  was  made.  The  potassium  is  supplied  in  100  pounds 
of  potassium  sulfate  per  acre.  On  Plot  19,  nitrogen  is  applied  in  200  pounds 
of  dried  blood  per  acre  per  year.  The  manure  and  residues  are  supplied  as 
described  in  the  introduction.  Some  legume  cover  crops  have  been  grown  in 
the  corn. 

'Only  two  crops. 


1919} 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


435 


TABLE  30. — HARTSBURG  FIELD :     CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BLACK  CLAY  LOAM  PRAIRIE;  MIDDLE  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1912 
Oats1 

1913 
Clover3 

1914 
Wheat8 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

39.5 
30.5 
43.9 
37.2 

(1.88) 
(1.84) 
(2.03) 
(1.90) 

35.9 
27.9 
36.1 
33.8 

52.9 
51.2 
61.9 
64.1 

62.7 
59.4 
74.5 
71.2 

(1.90) 
(2.57) 
(2.51) 
(2.63) 

M  

ML  

MLP  

105 
106 
107 
108 
109~ 
110 

0  

35.0 
33.0 
35.3 
37.8 

2.67 
2.33 
2.67 
2.50 

30.2 
30.8 
32.1 
36.0 

45.0 
52.1 
60.5 
63.9 

53.3 

54.8 
58.3 
60.6 

1.75 
2.25 
2.00 
2.50 

R         

RL  

RLP  

RLPK  

33.0 
31.2 

2,25 

(1.95) 

36.2 
33.7 

62.7 
49.3 

63.0 
56.2 

2.50 
(1.86) 

0  

Corn1 

Oats3 

Soy- 
beans3 

Wheat3 

Corn 

Oats 

201 
202 
203 
204 

0     

32.1 
33.4 
45.3 
38.4 

25.5 
21.9 
25.6 
24.1 

(1.51) 
(1.90) 
(1.88) 
(1.80) 

39.9 
41.5 
42.8 
45.1 

32.2 
36.0 
45.1 
41.9 

45.6 
52.2 
61.1 
56.6 

M  

ML  

MLP  

205 
206 
207 
208 

0  

35.0 
36.6 
37.0 
40.5 

22.8 
20.5 
19.5 
22.3 

22.1 
22.6 
21.2 
21.2 

40  7 
40.9 
34.3 
39.7 

30.7 
48.2 
49.9 
45.2 

42.8 
86.9 
78.4 
89.4 

R  

RL  •  

RLP  

209 
210 

RLPK  

38.3 
39.2 

24.8 
22.3 

20.8 
(1.40) 

41.7 
37.8 

44.2 
31.6 

90.3 
43.1 

0  

Wheat3 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

o  , 

21.1 
21.3 
33.1 
30.0 

25.8 
30.9 
36.9 
36.9 

(1.43) 
(1.84) 
(1.96) 
(2.23) 

14.4 
21.8 
29.0 
34.6 

38.2 
48.7 
60.7 
63.7 

M  

ML  

MLP  

305 
306 
307 
308 

a  

27.1 
34.2 
49.5 
41.7 

33.1 
31.2 
32.5 
36.4 

30.8 
28.4 
30.1 
28.2 

28.7 
31.5 
32.7 
34.9 

43.9 
79.1 

84.8 
85.7 

R  

RL  

RLP  

309 
310 

RLPK  

39.5 
26.7 

35.5 
34.5 

28.9 
(2.00) 

34.5 
26.8 

84.1 
49.1 

0  

Soy- 
beans1 

Wheat3 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0  

12.1 
(   .99) 
(1.12) 
(1.20) 

26.2 
24.8 
29.9 
33.2 

31.3 
35.0 
46.5 
39.0 

48.8 
58.0 
63.1 
66.2 

(1.40) 
(2.07) 
(2.12) 
(2.28) 

19.1 
31.7 
32.7 
42.2 

M  

ML  

MLP  

405 
406 
407 
408 

0  

15.0 
17.5 
17.3 
17.4 

28.7 
30.6 
28.8 
32.1 

33.9 
41.2 
43.0 
45.1 

46.9 
51.6 
54.2 
53.3 

.67 
.50 
.75 
.83 

35.8 
40.3 
34.8 
40.8 

R  

RL  

RLP  

409 
410 

RLPK  

17.6 
16.1 

30.9 
32.4 

45.6 
38.1 

52.0 
50.2 

.67 

(2.17) 

39.7 
40.7 

0  

only.       'Yields  not  taken.        'No  manure. 


436 


BULLETIN  No.  219 


[May, 


TABLE  30. — HARTSBURG  FIELD,   Concluded 


Plot 
No. 

Soil 
treatment 
appli  d 

1913 
Alfalfa 

1914 
Alfalfa 

1915 
Alfalfa 

1916 
Alfalfa 

1917 
Alfalfa 

Tons  per  acre 

501 
502 
503 
504 

0.  .  . 

2.36 
2.89 
3.20 
3.31 

4.11 
4.23 
4.51 
4.66 

4.67 
5.20 
5.35 
5.58 

3.17 
3.66 
3.85 
3.94 

3.20 
3.84 
3.65 
4  05 

M  

ML  

MLP  

505 
506 
507 
508 
509 
510 

0     

1.80 
2.79 
2.12 
2.28 
2.72 
1.87 

3.53 
4.24 
3.56 
4.04 
4.49 
3.71 

4.53 
5.17 
4.72 
5.33 
5.52 
4.46 

3.38 
3.67 
3.25 
3.15 
3.49 
2.60 

3.42 
3.38 
3.24 
3.98 
4.00 
3.14 

0  

L  

LP  

LPK  

0  

511 
512 
513 
514 
515 

M.. 

2.45 
2.79 
3.71 
3.30 
1.79 

3.61 
3.76 
4.63 
4.73 
3.92 

4.52 
4.61 
5.03 
5.09 
4.19 

2.79 
2.94 
3.36 
3.96 
2.81 

2.83 
2.92 
3.45 
3.87 
2.39 

ML  

MLP  

MP  

0  

TABLE  31. — HARTSBURG  FIELD:  GENERAL  SUMMARY,  «FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
4  crops 

Wheat 
4  crops1 

Clover 

2  crops 

Soybeans 
2  crops1 

1 
2 
3 
4 

0.. 

35.1 
38.4 
49.5 
47.7 

45.7 
50.1 
58.9 
57.7 

27.3 
30.7 
35.1 
38.9 

(1.65) 
(2.32) 
(2.31) 
(2.46) 

(1-47) 
(1.87) 
(1  .  92) 
(2.01) 

M  

ML  

MLP  

5 
6 

7 
8 

0.. 

36.1 
51.0 
57.5 
56.3 

44.0 
56.1 
55.9 
59.9 

33.9 
35.9 
33.5 
37.9 

1.21 
1.38 
1.38 
1.67 

26.4 
25.5 
25.7 
24.7 

R  

RL  

RLP  

9 
10 

RLPK  

55.2 
39.0 

60.2 
46.0 

38.0 
34.8 

1.59 

(2.01) 

24.9 
(1.70) 

0  

NOTE. — The  rotation  and  soil  treatment  are  standard,  as  described  in  the 
introduction,  with  the  exception  that  alfalfa  is  grown  upon  a  fifth  field  (con- 
taining some  extra  plots)  for  five  years,  after  which  this  field  is  brought  into 
the  regular  rotation  and  alfalfa  reseeded  on  another  field. 

*No  manure  on  1914  wheat  or  soybeans,  nor  on  1915  wheat. 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


437 


TABLE  32. — JOLIET  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  LATE  WISCONSIN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1914 
Wheat1 

1915 
Soybeans2 

1916 
Corn 

1917 
Oats 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0    . 

16.5 
19.3 
20.9 
21.5 

(1.42) 
(1.50) 
(1.68) 
(1.82) 

18.1 
29.4 
34.0 
33.4 

73.4 
80.1 
79.4 
83.1 

M  

ML  

MLP  

105 
106 
107 
108 

0.  . 

18.2 
19.9 
20.8 
20.2 

15.2 
14.0 
15.8 
15.2 

18.5 
18.9 
21.6 
25.0 

70.2 
73.8 
73.8 
80.5 

R  

RL  

RLP  

109 
110 

RLPK  

22.0 
17.4 

16.3 
15.1 

25.1 
18.6 

70.5 
75.5 

0  

Clover1 

Wheat2 

Soybeans2 

Corn 

201 
202 
203 
204 

0.  . 

(2.00) 
(2.05) 

(1.97) 
(2.02) 

9.8 
7.9 
14.3 
20.3 

(   -55) 
(   -59) 
(   -66) 
(   -63) 

7.3 
7.9 
10.4 
14.3 

M  

ML  

MLP  

205 
206 
207 
208 

0  

(1.91) 
.42 
1.00 
.92 

10.6 
15.6 
20.0 
24.9 

8.2 
7.9 
8.9 
11.5 

6.0 
7.7 
11.1 
14.6 

R  

RL  

RLP  

209 
210 

RLPK  

1.83 
1.25 

30.4 
25.2 

15.0 
(1.06) 

23.4 
23.7 

0  

Oats1 

Soybeans2 

Wheat8 

Soybeans* 

301 
302 
303 
304 

0.  .  . 

60.9 
60.2 
59.8 
59.5 

10.6 

(1.42) 
(1.69) 

(1.75) 

4.1 
.   '   5.2 
8.3 
7.9 

(1.58) 
(1.66) 
(1.67) 
(1.78) 

M  

ML  

MLP  

305 
306 
307 
308 

0  

50.2 
53.3 
60.8 
59.1 

13.9 
13.0 
13.7 
15.1 

6.0 
9.9 
13.2 

18.7 

9.4 
8.8 
8.2 
11.5 

R  

RL  

RLP  

309 
310 

RLPK  

68.8 
52.5 

15.0 
12.8 

15.2 

7.1 

12.6 
(1.39) 

0  

Corn1 

Oats2 

Clover2 

Wheat2 

401 
402 
403 
404 

0.  . 

44.7 
46.9 
52.4 
50.2 

72.5 
73.0 
70.5 
75.0 

(1.17) 
(1.24) 
(1.16) 
(1.64) 

8.2 
10.3 
10.9 
19.6 

M  

ML  

MLP  

405 
406 
407 
408 

0  

42.3 
50.6 
53.2 
51.0 

67.7 
62.8 
63.4 
65.0 

.33 

.42 
.50 
.50 

9.8 
8.8 
13.4 
22.5 

R  

RL  

RLP  

409 
410 

RLPK  

53.1 
45.1 

72.0 
63.1 

.42 

(1-15) 

24.3 
0.0 

0  

GENERAL  NOTES. — The  rotation  practiced  is  wheat,  soybeans,  corn,  oats, 
clover,  and  alfalfa.  The  alfalfa  will  remain  down  six  years,  when  it  will  be 
changed  to  one  of  the  other  fields.  The  soil  treatment  is  standard,  as  described 
in  the  introduction. 

only.    2No  manure. 


438 


BULLETIN  No.  219 


[May, 


TABLE  32. — JOLIET  FIELD,  Concluded 


Plot 
No. 

Soil 
treatment 
applied 

1914 
Soybeans1 

1915 
Corn 

1916 
Oats 

1917 
Soybeans 

Bushels  or  (tons)  per  acre 

501 
502 
503 
504 

0  

(1.24) 
(1.40) 
(1.51) 
(1.28) 

28.6 
36.3 
•38.3 

47.7 

70.9 
75.9 

77.2 
77.7 

(1.60) 

(1.74) 
(1.84) 
(1-87) 

M  

ML  

MLP  

505 
506 
507 
508 

0.  . 

12.1 
11.9 
13.3 
11.9 

28.5 
32.4 
28.7 
31.2 

73.3 
71.1 
63.9 
59.8 

10.9 
11.0 
11.0 
13.4 

R  

RL  

RLP  

509 
510 

RLPK  

14.8 

(1.12) 

43.4 
27.1 

81.4 
74.1 

14.7 
(1.50) 

0  

Alfalfa1 

Alfalfa8 

Alfalfa3 

Alfalfa8 

601 
602 
603 
604 

0.  . 

(1-79) 
(2.13) 
(2.83) 
(3.73) 

(1.46) 
(1.78) 
(2.96) 
(4.35) 

(   -44) 
(  -47) 
(   -81) 
(1-28) 

M  

ML.  .. 

MLP  

605 
606 
607 
608 

0.  . 

(2.18) 
(2.57) 
(2.90) 
(3.39) 

(2.16) 
(2.23) 
(2.88) 
(4.10) 

(  -71) 
C  -74) 
(  -97) 
(1.28) 

R  

RL  

RLP  

609 
610 

RLPK.. 

(3.56) 
(1.90) 

(4.38) 
(1.72) 

(1.46) 
(  .41) 

0  

JLime  only,     "No  residues  or  manure. 


1919] 


ILLINOIS  CROP  YIELDS  PROM   SOIL  EXPERIMENT  FIELDS 


439 


TABLE  33.— KEWANEE  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  UPPER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil  treatment  applied 

1915 
Corn1 

1916 
Oats2 

1917 
Clover5 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0.  . 

32.6 
40.5 
37.3 
37.5 

66.4 
68.4 
68.3 
63.6 

(1-67) 
(2.33) 
(2.04) 
(1.70) 

M  .'  

ML  

MLP    

105 
106 
107 
108 

0.  . 

38.6 
32.4 
44.2 
36.3 

69.8 
63.3 
62.3 
68.1 

0.42 
0.54 
0.67 
0.79 

R  

RL    

RLP  :  

109 
110 

RLPK  

41.6 
44.2 

64.7 
63.4 

0.58 

(1.85) 

0  

Wheat1 

Corn8 

Oats 

201 
202 
203 
204 

0.  . 

33.8 
35.0 
36.5 
29.9 

42.7 
43.7 
50.6 
46.0 

72.0 

84.4 
95.2 
82.7 

M     

ML  

MLP  

205 
206 
207 
208 

0  

30.8 
41.2 
27.2 
29.7 

46.3 
47.9 
52.5 
49  '.2 

72.3 
70.5 
68.6 
71.2 

R  

RL  

RLP  

209 
210 

RLPK  . 

28.8 
31.7 

54.2 
45.6 

77.3 
67.8 

0  

~3oT 

302 
303 
304 

Soybeans1 

Wheat2 

Corn 

0 

19.7 
(1.78) 
(1-62) 

(1.70) 

17.8 
13.6 
10.1 
15.5 

47.5 
•      49.2 
56.2 
58.5 

M     

ML  

MLP  

305 
306 
307 
308 

0.  . 

20.2 
19.1 
19.6 
19.7 

12.8 
13.7 
10.2 
14.3 

44.1 
39.9 
47.0 
51.0 

R  

RL                 

RLP  

309 
310 

RLPK  

22.2 
19.7 

16.4 
14.8 

57  6 
44.0 

0  

Oats1 

Clover4 

Wheat6 

401 
402 
403 
404 

0.  . 

83  8 
80.0 
91.6 
77.0 

(2.43) 
(2.34) 
(2.51) 
(2.04) 

26.5 
27.5 
27.3 
26.1 

M  

ML  

MLP  

405 
406 
407 
408 

0.  . 

84.8 
77.5 
88.1 

87.8 

30.2 
34.8 
32.0 
33.2 

R.  .    .  . 

RL  

RLP  

409 
410 

RLPK. 

95.6 

72.2 

(i'95) 

38.7 
19.7 

0  

NOTE. — The  rotation  and  soil  treatment  are  standard,  as  described  in  the 
introduction. 

^Limestone  only.  2No  manure  or  potassium.  8No  potassium.  4No  phosphorus, 
manure  or  potassium.  5No  manure. 


440 


BULLETIN  No.  219 


[May, 


TABLE  34.— LAMOILLE  FIELD,  MAIN  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  LATE  WISCONSIN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1910 
Bar- 
ley1 

1911 
Corn8 

1912 

Oats2 

1913 
Soy- 
beans5 

1914 
Wheat6 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

32.6 
41.7 
39.8 
37.7 

82.5 
84.8 
79.6 

72.4 

63.9 
63.1 
60.9 
46.7 

(1.94) 
(1.75) 
(1.56) 
(1.55) 

45.7 
44.5 
41.3 
37.5 

33.3 
45.2 
38.3 
36.1 

75.0 
77.3 
66.9 
61.2 

(1.34) 
(1-37) 
(1.32) 
(1.40) 

M  

ML  

MLP.... 

105 
106 
107 
108 

0 

30.5 
48.0 
41.1 
46.7 

73.5 
79.4 
81.5 
80.0 

64.2 
66.4 
67.2 
65.6 

17.5 
17.7 
19.0 
19.1 

39.2 
46.8 
46.9 
46.7 

20.0 
31.1 
32.1 
33.1 

54.7 
73.1 
74.4 
70.3 

.25 
.29 
.29 
.29 

R  

RL  
RLP  .... 

109 
110 

RLPK... 
0  

41.0 
41.7 

74.2 
75.0 

57.2 
61.6 

19.7 
18.3 

45.9 
43.0 

32.6 
24.6 

67.3 
67.3 

.58 
(1-31) 

201 
202 
203 
204 

Soy- 
beans1 

Wheat3 

Corn4 

Oats 

Clover 

Wheat 

Corn 

Oats 

0 

15.0 
16.3 
14.9 
15.0 

19.3 
43.3 
38.2 

37.8 

87.8 
88.7 
83.1 
78.9 

63.6 
75.2 
72.5 
69.7 

(3.29) 
(4.83) 
(4.67) 
(4.56) 

30.8 
42.1 
47.1 

48.3 

38.4 
46.5 
47.3 
44.0 

88.0 
89.4 
89.7 
95.9 

M  

ML  

MLP.... 

205 
206 
207 
208 

0  

11.3 
12.2 
12.0 
11.3 

37.9 
41.2 
41.2 
41.3 

69.5 
73.9 
73.9 
70.1 

64.4 
72.2 
73.0 
75.5 

4.08 
2.75 
3.00 
3.25 

46.8 
45.8 
36.7 
40.8 

32.8 
39.4 
42.2 
39.7 

87.5 
95.9 
89.4 
91.7 

R  

RL  

RLP.  ... 

209 
210 

RLPK... 
0  

11.3 
14  .'0 

39.6 
40.8 

77.0 
67.4 

66.7 
71.9 

3.25 

(4.14) 

45.8 
34.2 

38.1 
36.3 

85.2 
81.6 

30T 
302 
303 
304 

Oats1 

Soy- 
beans* 

Bar- 
ley3 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

0  

61.3 
74.1 
65.9 
59.4 

18.0 
21.2 
22.1 
21.2 

44.7 
46.3 
47.2 
43.0 

35.6 
51.2 
46.6. 
47.9 

51.6 
58.9 
60.5 
56.2 

(2.20) 
(2.20) 
(2.18) 
(2.20) 

21.5 
29.8 
30.7 
28.6 

22.8 
40.3 
36.1 
42.5 

M  

ML  

MLP.... 

305 
306 
307 
308 

0  

44.7 
52.8 
70.5 
61.6 

21.8 
20.4 
21.9 
21.0 

44.8 
45.2 
52.2 
47.5 

40.2 
58.9 

58.8 
58.8 

50.0 
57.5 
60.5 
60.2 

16.2 
16.8 
16.6 
14.4 

10.9 
25.9 
36.2 
34.2 

24.6 
31.2 
38.9 
35.8 

R  

RL  

RLP.  ... 

309 
310 

RLPK.  .  . 
0  

53.4 
58.6 

19.7 
20.0 

47.1 
44.5 

51.0 
36.1 

57.8 
46.1 

14.7 

(1.96) 

32.7 
25.3 

34.1 
20.1 

Corn1 

Oats2 

Soy- 
beans8 

Wheat6 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0  

34.6 
35.4 
37.2 
36.2 

57.5 
55.6 
58.1 
61.9 

(2.11) 
(2.17) 
(2.14) 
(2.20) 

42.7 
45.8 
44.6 
45.8 

44.3 
57.3 
55.7 
61.2 

75.8 
80.8 
90.8 
83.4 

(2.90) 
(2.77) 
(2.54) 
(2.51) 

40.1 
45.2 
46.8 
45.3 

M  

ML  . 

MLP.... 

405 
406 
407 
408 

0  

37.4 
40.5 
39.8 
38.9 

68.1 
66.6 
66.3 
63.0 

30.6 
28.8 
27.1 
25.8 

48.8 
54.4 
55.9 
53.8 

49.9 
58.5 
52.9 
56.2 

54.7 

85.8 
68.8 
76.6 

.25 
.25 
.08 
.17 

42.8 
44  .4 
48.2 
48.8 

R  

RL  

RLP.  .  .  . 

409 
410 

RLPK... 
0  

39.4 
36.9 

58.9 
50.8 

25.8 
26.0 

49.8 
44.4 

59.1 
40.7 

85.9 
64.1 

.33 

(2.64) 

49.1 
39.8 

*No  soil  treatment.     2Eesidues  only.     "No  lime  or  manure.     4No  lime.     5No 
phosphorus,  manure  or  potassium.     "No  manure. 


1019] 


ILLINOIS  CROP  YIELDS   PROM   SOIL   EXPERIMENT   FIELDS 


441 


TABLE  34a.— LAMOILLE  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 
BROWN  SILT  LOAM;  EARLY  WISCONSIN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1913 
Potatoes 

1914 
Potatoes 

1915 
Alfalfa 

1916 
Alfalfa 

1917 
Alfalfa8 

Bushels  of  potatoes  or  tons  of  alfalfa  hay,  per  acre 

501 
502 
503 
504 

0..              

153.2 
156.8 
163.5 
161.8 

140.3 

108.2 
111.7 
124.3 



3.39 
4.58 
4.77 
4.08 



M  

ML  

MLP  

Alfalfa7 

Alfalfa6 

Potatoes 

Potatoes 

Alfalfa8 

601 
602 
603 
604 

0.  . 

6.64 
6.68 
6.82 
6.58 

203.0 

222.8 
228.5 
182.0 

99.2 
216.3 
196.7 
160.2 

M  

ML  

MLP  

Alfalfa7 

Alfalfa6 

Alfalfa" 

Alfalfa6 

Potatoes 

701 
702 
703 
704 

0.  . 

5.39 
5.20 
5.28 
5.32 

4.20 
4.73 
4.83 
4.70 

4.64 
4.77 
5.27 

4.72 

64.0 
98.0 
91.8 
96.8 

M  

ML  

MLP.  .  ..  

Alfalfa7 

Alfalfa6 

Alfalfa6 

Alfalfa6 

Alfalfa8 

801 
802 
803 
804 

0.  . 

5.24 
5.01 
5.79 
6.24 

4.29 
4.46 
4.60 
6.01 

4.48 
4.61 
4.45 
4.64 

M   

ML  

MLP  

'No  manure.     'No  soil  treatment;  plot  yields  not  taken.     "Winter-killed. 


TABLE  35.— LAMOILLE  FIELD:  GENERAL  SUMMARY, FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
5  crops 

Wheat 
4  crops1 

Clover 
3  crops 

Potatoes 
5  crops 

1 

2 
3 
4 

0  

34.9 
48.1 
44.8 
46.3 

70.8 
76.3 
76.1 
73.2 

34.5 
40.4 
41.5 
39.9 

(2.51) 
(2.99) 
(2.84) 
(2.82) 

131.9 
160.4 
158.4 
145.0 

M  

ML  

MLP  

5 

6 

7 
8 

0  

33.5 
43.8 
45.0 

44.7 

62.3 
76.9 
73.2 
74.9 

34.9 
40.7 
42.0 
42.6 

1.52 
1.10 
1.12 
1.24 

R  

RL  

RLP  

9 
10 

RLPK  

43.0 
31.6 

72.6 
66.2 

43.4 
35.6 

1.38 

(2.70) 

0  

GENERAL  NOTES. — The  main  rotation  and  soil  treatment  are  standard,  as 
described  in  the  introduction.  Series  500,  600,  700,  and  800  are  used  for  a 
rotation  of  potatoes  and  alfalfa.  The  potatoes  are  grown  for  two  years  and 
alfalfa  for  six  years.  Limestone  at  the  rate  of  4  tons  per  acre  is  applied  before 
the  alfalfa ;  and  rock  phosphate  at  the  rate  of  2  tons  per  acre,  before  the  first 
crop  of  potatoes.  Fifteen  tons  of  manure  is  applied  for  each  potato  crop. 

*No  manure  on  1914  wheat. 


442 


BULLETIN  No.  219 


[May, 


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1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


443 


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444 


BULLETIN  No.  219 


[May, 


TABLE  36a.— LEBANON  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1911 
Potatoes 

1912 
Corn 

1913 
Soybeans 

1914 
Potatoes 

1915 
Corn 

1916 
Soybeans 

1917 
Potatoes 

Bushels  or  (tons)  per  acre 

501 
502 
503 
504 

0.. 

30.1 
32.0 
20.5 
17.5 

55.9 
65.9 
58.1 
57.5 

24.0 
24.1 
21.9 

24.4 

13.3 
17.6 
16.6 
8.5 

45.0 
65.4 
60.8 
61.6 

22.8 
22.0 
21.2 
19.8 

22.0 
64.8 
63.8 
33.6 

M  

ML  

MLP  

Soy- 
beans1 

Potatoes 

Corn 

Soy- 
beans 

Potatoes 

Corn 

Soy- 
beans 

601 
602 
603 
604 

0.. 

(2.12) 
(2.02) 
(2.17) 
(1.90) 

77.5 
67.1 
53.1 

67.4 

57.0 
60.2 
63.8 
51.9 

30.7 
31.7 
34.6 
30.7 

100.1 
110.0 
132.3 
90.6 

42.3 
41.9 
45.6 
43.5 

(3.10) 
(3.18) 
(3.22) 
(3.58) 

M  

ML  

MLP  

TUT 
702 
703 
704 

Corn1 

Soy- 
beans1 

Potatoes 

Corn 

Soy- 
beans 

Potatoes 

Corn 

0.  . 

48.2 
46.4 
38.1 
43.2 

(2.93) 
(2.53) 
(2.08) 
(2.22) 

35.3 
40.5 
31.9 
29.3 

13.0 
16.7 
19.3 
19.2 

11.8 
10.3 
13.7 
12.5 

63.3 
83.7 
68.9 
73.9 

59.6 
59.0 
58.1 
64.4 

M.. 

ML  

MLP.... 

limestone  only. 


TABLE  37.— LEBANON  FIELD,  MAIN  ROTATION:  GENERAL  SUMMARY 
FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
6  crops 

Oats 
5  crops 

Wheat 
4  crops 

Clover 
4  crops 

1 
2 
3 

4 

0.  .  . 

27.2 
34.4 
39.8 
37.5 

19.4 
25.5 
32.3 
31.5 

29.6 
34.3 
36.3 
38.4 

(3.12) 
(3.64) 
(3.89) 
(3.76) 

M  

ML  

MLP  

5 
6 

7 
8 

0.. 

23.7 
28.6 
38.6 
38.0 

20.7 
26.1 
35.3 
30.8 

24.8 
27.3 
32.6 
35.2 

.90 
.77 
.73 
.75 

R.... 

RL  

RLP  

9 
10 

RLPK  

41.2 
26.5 

37.6 
19.4 

33.5 
27.1 

.77 
(2.52) 

0  

TABLE  37a.— MINOR  ROTATION 


Corn 
6  crops 

Potatoes 
7  crops 

Soybeans 
5  crops1 

1 

0.  . 

45.4 

48.8 

24.0 

2 

M  

51.5 

59.4 

24.0 

3 

ML  

51  0 

55  3 

24.7 

4 

MLP  

49.7 

45.9 

24.4 

GENERAL  NOTES. — The  main  rotation  and  soil  treatment  are  standard,  as 
described  in  the  introduction.  The  minor  rotation  is  corn,  soybeans,  and  pota- 
toes, the  soil  treatment  being  the  same  as  for  the  main  rotation  with  the 
exception  that  45  tons  of  manure  is  applied  per  acre  for  the  potato  crop. 

1One  crop  was  hay;  in  making  this  average,  1  ton  of  hay  is  counted  equiv- 
alent to  10  bushels  of  seed. 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL   EXPERIMENT   FIELDS 


445 


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446 


BULLETIN  No.  219 


[May, 


TABLE  40. — MINONK  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;     EARLY  WISCONSIN  GLACIATION 


Plot 

No. 

Soil 
treat- 
ment 
applied 

19101 
Bar- 
ley 

1911 
Corn2 

1912 

Oats4 

1913 
Clover4 

1914 

Wheat5 

1915 
Corn 

1916 
Oats 

1917 

Soy- 
beans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0    

38.1 
29.4 
29.5 
33.7 

72.8 
66.8 
63.1 
61.0 

42.8 
43.4 
39.7 
39.1 

(3.94) 
(4.04) 
(3.86) 
(3.61) 

53.2 
51.3 
55.8 
49.0 

51.8 
56.4 
61.4 
57.0 

63.1 
55.3 
55.6 
50.9 

(1.43) 
(1.70) 
(1.94) 
(2.06) 

M  

ML  

MLP.... 

105 
106 
107 
108 

0   

33.0 
36.9 
39.9 
44.0 

58.6 
72.3 
71.2 

72.4 

41.3 
51.3 

42.5 
37.5 

.67 
.83 
.67 
.67 

53.0 
47.0 
35.2 
33.8 

50.0 
52.2 
43.8 
40.2 

52.2 
55.9 
58.1 
60.6 

20.0 
19.2 
18.0 
17.8 

R  

RL 

RLP.  ... 

109 
110 

RLPK.  .  . 
0  

39.5 
42.4 

73.8 
68.8 

31.9 
34.4 

.50 

(1.63) 

29.8 
27.3 

43.8 
43.6 

60.6 
56.9 

16.0 
(1.23) 

Soy- 
beans 

Wheat3 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

Oats 

201 
202 
203 
204 
205 
206 
207 
208 

0.  . 

13.3 
14.7 
15.0 
14.7 

25.9 
25.7 

28.5 
25.8 

65.4 
70.6 
69.4 
74.3 

39.7 
38.0 
41.6 
41.6 

(1.10) 

(1.22) 
(1.23) 
(  -98) 

52.2 
52.6 
53.6 
61.1 

37.5 
35.7 
35.1 
31.6 

76.1 
67.0 
73.8 
65.8 

M  

ML  

MLP.... 

0  

13.3 
12.5 
13.5 
11.2 

26.0 
26.8 
22.7 
22.2 

63.9 
65.0 
69.7 
68.4 

39.1 
35.0 
36.2 
40.2 

8.7 
10.8 
8.5 
8.8 

51.0 
51.2 
49.9 
47.6 

26.4 
37.1 
34.9 
35.6 

63.6 
78.9 
75.0 
79.7 

R  

RL  

RLP.  ... 

209 
210 

RLPK... 

0  

11.8 
12.7 

23.8 
20.0 

69.8 
66.3 

44.4 
44.1 

7.7 
(.69)" 

48.1 
44.5 

34.6 
22.8 

78.9 
63.8 

Oats 

Clover8 

Wheat6 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

o  

67.2 
66.9 
65.5 
62.8 

(2.75) 
(2.65) 
(2.54) 
(2.65) 

11.1 
11.3 
15.6 
17.9 

54.1 
63.9 
60.6 
65.2 

40.6 
42.0 
43.3 

44.8 

(1.72) 
(1-70) 
(1.78) 
(1.70) 

30.7 
37.7 
35.1 
38.0 

54.7 
63.8 
67.5 
69.3 

M  

ML.    ... 

MLP.... 

305 
306 
307 
308 

0  

58.3 
58.3 
56.7 
56.9 

(2.82) 

15.3 
17.8 
15.8 
18.0 

57.9 
64.0 
62.0 

58.7 

45.0 
44.5 
45.8 
42.5 

19.7 
18.6 
18.3 
20.7 

34.5 
38.3 
35.5 
34.4 

46.4 
60.6 
70.0 

68.7 

R  
RL  
RLP..  .. 

309 
310 

RLPK.  .  . 

0  

,61.9 
64.2 

(2*05) 

13.3 
6.7 

59.2 
44.5 

38.8 
29.2 

19.2 
(1.63) 

31.8 

28.2 

69.9 
52.9 

Corn 

Oats2 

Soy- 
beans4 

Wheat5 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0.  . 

52.0 
48.9 
50.9 
51.8 

52.5 
52.5 
55.3 

49.4 

(1.27) 
(1-54) 
(1.10) 

(1.24) 

33.8 
31.8 
27.9 
33.5 

19.9 
22.6 
18.7 
24.7 

89.4 
93.0 
93.4 
103.1 

(2.07) 
(2.06) 
(1.82) 
(2.32) 

9.9 
14.0 
11.2 
17.1 

M  

ML  

MLP.  .  .  . 

405 
406 
407 
408 

0.  . 

52.4 
49.6 
45.4 
45.0 

55.6 
56.4 
54.8 
55.5 

10.7 
10.6 
11.5 
11.5 

33.7 
39.2 
38.7 
41.2 

24.2 
33.8 
38.6 
35.8 

93.4 
88  1 

100  io 

101.9 

.25 

.08 
.00 
.08 

17.9 
23.9 
21.2 

22.8 

R  

RL  

RLP.... 

409 
410 

RLPK... 

0  

51.6 

45.4 

53.3 
53.4 

11.4 
13.0 

44.0 
36.7 

35.9 
27.5 

105.5 
106.0 

.08 
(2.30) 

21.5 
12.1 

*No  treatment.     2Eesidues  only.     3No  manure  or  limestone.     4Kesidues  and 
limestone  only.     'No  manure.     'Estimated. 


1919} 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


447 


TABLE  39. — McNABB  FIELD:  GENERAL  SUMMARY,  FTTLLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
9  crops 

Oats 
8  crops 

Wheat 
7  crops 

Clover 
3  crops 

1 

2 
3 
4 
5 

R  

69.9 
76.2 
74.9 
75.3 

68.7 

58.8 
61.8 
61.2 
65.2 
61.2 

34.6 
35.8 
34.3 
35.0 
33.1 

.39 
.39 
(3.12) 
(3.18) 
(3.07) 

RP  

0  

MP  

M  

GENERAL  NOTES. — The  rotation  followed  is  corn,  oats,  wheat,  and  clover. 
Legume  catch  crops  are  seeded  in  the  corn.  The  manure,  residues,  and  phos- 
phorus are  applied  as  described  in  the  introduction.  (A  strip  running  thru 
the  middle  of  this  field  occupied  by  Plot  3  is  abnormally  productive.) 


TABLE  41. — MINONK  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
6  crops 

Oats 
5  crops 

Wheat 
4  crops1 

Clover 
1  crop 

Soybeans 
3  crops 

1 
2 
3 
4 

0.. 

47.2 
52.2 
52.1 
53.7 

61.8 
59.1 
61.5 
61.2 

36.5 
38.9 
38.9 
41.3 

(2.07) 
(2.06) 
(1.82) 
(2.32) 

(1.42) 
(1.54) 
(1.65) 
(1  .  58) 

M  

ML  

MLP  

5 
6 
7 
8 

0  

44.8 
52.1 
53.2 
51.2 

58.7 
60.5 
63.0 
65.0 

39.1 
40.1 
35.4 
34.7 

.25 
.08 
.00 
.08 

16.1 
16.2 
14.9 
15.8 

R  

RL  

RLP  

9 
10 

RLPK  

52.2 

42  9 

65.6 
60.0 

32.8 
28.0 

.08 
(2.39) 

14.3 

(1.18) 

0  

NOTE. — The  rotation  and  soil  treatment  are  standard,  as  described  in  the 
introduction. 

*No  manure  on  1914  crop. 


418 


BULLETIN  No.  219 


[May, 


TABLE  42.— MT.  MORRIS  FIELD,  MAIN  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  low  AN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1910 
Barley1 

1911 
Corn2 

1912 
Oats2 

1913 
Clover8 

1914 
Wheat6 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0    

44.6 
42.9 
30.2 
26.4 

53.8 
54.1 
46.7 
46.5 

49.1 
50.0 
27.0 
40.3 

(3.17) 
(3.70) 
(2.37) 
(2.18) 

40.5 
42.8 
36.2 
36.8 

17.9 
36.7 
41.0 
39.5 

67.0 
71.6 
63.0 
63.8 

(1.23) 
(1.72) 
(2.41) 
(2.52) 

M      

ML 

MLP.... 

105 
106 
107 
108 

0 

27.3 
23.1 
32.8 
30.7 

51.5 
52.1 
53.5 
57.9 

43.1 
39.4 
41.9 
47.5 

(2.59) 
.58 
1.00 
.83 

37.3 
38.4 
42.8 
43.4 

16.0 
20.9 
35.2 
38.0 

59.5 
60.0 
61.9 
54.7 

.50 
1.10 
1.33 
1.17 

R  

RL  

RLP.  ... 

109 
110 

RLPK.  .  . 
0  

34.7 
30.7 

52.9 
55.7 

48.4 
41.6 

.92 

(3.66) 

47.4 
44.6 

40.5 
19.7 

62.8 
30.3 

.83 

(1.25) 

Soy- 
beans1 

Wheat3 

Corn* 

Oats 

Clover 

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  .  . 

17.8 
15.8 
15.2 
12.3 

20.8 
16.2 
15.4 
16.5 

48.6 
56.8 
57.4 
58.7 

52.8 
63.0 
50.3 
61.7 

(1.85) 
(2.74) 
(3.44) 
(3.52) 

31.7 
35.9 
40.1 
44.0 

29.5 
43.8 
50.7 
51.0 

76.2 
85.2 
97.3 
95.5 

M  

ML.    ... 

MLP.  .  .  . 

205 
206 
207 
208 

0 

16.1 
16.1 
16.3 
14.5 

17.0 
16.3 
18.2 
21.3 

49.6 
45.8 
48.8 
53.0 

48.8 
62.5 
63.3 
69.2 

(1-74) 
1.00 
1.25 
1.00 

30.8 
37.7 
42.1 
47.1 

33.3 
42.9 
55.5 

57.2 

78.4 
81.1 
95.8 
99.4 

R  

RL  

RLP.  ... 

209 
210 

RLPK.  .  . 
0  

11.  .8 

12.2 

23.5 
22.0 

62.1 
51.1 

63.1 
48.0 

1.67 
1.50 

48.2 
42.9 

56.5 
42.4 

101.4 

74.5 

Oats1 

Soy- 
beans8 

Bar- 
ley3 

Corn 

Oats 

Clover 

Wheat 

Corn 

301 
302 
303 
304 

0  

54.2 
53  1 
50.8 
51.6 

13.7 
18.3 
16.0 
17.4 

32.2 
31.3 
35.8 
33.3 

57.5 
72.9 
70.7 
67.1 

57.3 
56.4 
55.5 
51.7 

(4.35) 
(4.24) 
(4.18) 
(4.24) 

13.3 

17.6 
19.8 
24.8 

28.9 
48.2 
56.2 
57.4 

M  

ML 

MLP.... 

305 
306 
307 
308 
309 
310 

0.  . 

70.9 
68.7 
75.8 
62.5 

15.3 
18.5 
15.9 
19.6 

31.5 
30.2 
31.9 
33.4 

58.4 
66.1 
69.2 
76.8 

43.8 
50.0 
47.0 
56.2 

.42 
.50 
.42 
.17 

17.0 
19.7 
22.3 
26.8 

31.0 
38.0 
48.7 
51.7 

R  

RL  

RLP  

RLPK... 
0  

78.1 
62.5 

16.9 
18.2 

39.3 
29.8 

68.9 
51.5 

54.2 
53.1 

.08 

(3.37) 

28.7 
21.2 

56.4 
30.0 

Corn1 

Oats* 

Clover2 

Wheat6 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0.  . 

34.3 
35.1 
36.9 
35.8 

60.2 
63.6 
60.3 
70.3 

(2.10) 
(2.67) 
(2.87) 
(2.75) 

25.2 
26.2 
29.5 
33.3 

58.2 
71.3 
73.6 
68.8 

70.0 
67.0 
67.0 
69.4 

(2.16) 
(2.74) 
(3.09) 
(3.01) 

7.1 
7.8 
11.5 
11  8 

M  

ML  

MLP.  .  .  . 

405 
406 
407 
408 

0.  . 

37.1 
42.0 
41.2 
40.3 

65.3 
65.0 
71.1 
68.3 

(2.73) 
1.42 
1.42 
1.25 

27.8 
33.5 
32.0 
33.3 

58.4 
59.5 
64.5 
66.4 

66.4 
64.7 

57.7 
57.2 

.58 
.50 
.67 
.50 

7.8 
8.1 
11.5 
13.6 

R  

RL  

RLP  

409 
410 

RLPK... 
0  

40.9 
36.2 

68.3 
63.0 

1.17 

(2.18) 

36.8 
30.3 

67.5 
57.5 

57.3 
71.6 

.42 

(2  .  23) 

13.1 
5.9 

*No  treatment.     2Eesidues  only.     "No  manure  or  lime.     4No  manure.     "Resi- 
dues and  lime  onlj. 


1919} 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


449 


TABLE  42a.— MT.  MORRIS  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1913 
Potatoes 

1914 
Potatoes 

1915 
Barley 
hay 

1916 
Alfalfa 

1917 
Alfalfa 

.                              Bushels  or  (tons)  per  acre 

501 
502, 
503 
504 

0 

112.5 
163.2 
184.3 
207.7 

78.3 
158.0 
173.8 
175.0 

(   -52) 
(2.33) 
(1.96) 
(1.79) 

(1.16) 
(3.88) 
(5.33) 
(5.10) 

M  

ML  

MLP  

Alfalfa8 

Potatoes 

Potatoes 

Alfalfa 

601 
602 
603 
604 

0.  . 

(5.32) 
(5.47) 
(6.32) 
(6.70) 

197.8 
266.7 
252.5 
265.8 

71.7 
137.0 
145.0 
144.7 

M  

ML  

MLP  

Alfalfa6 

Alfalfa6 

Alfalfa6 

Potatoes 

701 
702 
703 
704 

0.  . 

(5.78). 
(5.95) 
(6.68) 
(6.67) 

(5.01) 
(5.16) 
(5.57) 
(5.61) 

(4.98) 
(5.77) 
(5.66) 
(5.57) 

94.8 
130.3 
126.5 
119.8 

M  

ML  

* 

MLP  

Alfalfa6 

Alfalfa6 

Alfalfa* 

Alfalfa 

801 
802 
803 
804 

0.  . 

(5.56) 
(5.51) 
(5.42) 

(5.77) 

(4.98) 
(4.80) 
(4.55) 
(4.90) 

(5.27) 
(5.34) 
(5.40) 

(5.17) 

M  

ML  

MLP  

•No  manure. 


TABLE  43.— MT.  MORRIS  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yield  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
5  crops 

Wheat1 
4  crops 

Clover 
4  crops 

Potatoes 
5  crops 

1 
2 
3 
4 

0.  . 

38.4 
53.5 
58.4 
56.8 

64.7 
68.6 
66.6 
68.4 

23.1 
26.0 
26.9 
29.3 

(2.40) 
(2.86) 
(3.28) 
(3.32) 

111.0 
171.0 

176.4 
182.6 

M         

ML  

MLP  

5 
6 

7 
8 

0  

39.4 
45.5 
54.6 
58.0 

59.4 
63.7 
65.1 
67.3 

23.2 
26.0 
29.7 
32.7 

.75 
.78 
.92 
.71 

R  

RL  

RLP  

9 
10 

RLPK  

58.0 
40.2 

67.8 
55.5 

34.3 
26.1 

.75 

(2.15) 

0  

GENERAL  NOTES. — The  main  rotation  and  soil  treatment  are  standard,  as 
described  in  the  introduction.  The  minor  rotation  is  potatoes  and  alfalfa, 
the  potatoes  being  grown  for  two  years  and  the  alfalfa  for  six  years;  the  soil 
treatment  as  indicated  is  standard,  as  described  in  the  introduction,  except 
that  15  tons  per  acre  of  manure  is  applied  for  each  potato  crop. 

*No  manure  on  1914  wheat. 


450 


BULLETIN  No.  219 


[May, 


TABLE  44.— NEWTON  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY,  PRAIRIE;  LOWER  ILLINOIS  AN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1912 
Corn1 

1913 
Soy- 
beans8 

1914 
Wheat4 

1915 
Corn 

1916 

Soy- 
beans 

1917 

Wheat 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0      

22.4 
20.4 
17.0 
28.4 

(  -38) 
(  -41) 
(  .42) 
(  -50) 

0.3 
0.3 
1.8 

4.2 

4'.4 
4.6 
15.6 
17.6 

(   -72) 
(  -78) 
(1.10) 
(1.16) 

0.0 
.3 
12.3 
20.5 

M  

ML  

MLP  

105 
106 
107 
108 

0  

29.6 
17.6 
14.2 
28.4 

4.3 
3.0 
3.2 
3.8 

4.7 
1.0 
1.8 
7.0 

9.0 
7.8 
15.6 
18.6 

5.7 
4.5 
5.3 

7.7 

3.3 
2.5 
11.3 

18.5 

R       

RL              

RLP  

109 
110 

RLPK  

19.6 
15.0 

3.2 

(   .29) 

4.2 
0.2 

18.4 

2.8 

6.0 

(  -57) 

19.5 
0.0 

0  

Cow- 
peas2 

Corn 

Soy7 
beans 

Wheat 

Corn 

Soy- 
beans 

201 
202 
203 
204 

0  . 

1.0 
3.4 
3.4 

4.4 

2.5 

(  -57) 
(  -67) 
(  -62) 

0.3 
0.5 
4.8 
12.7 

7.8 
12.2 
13.8 
13.8 

(0.0  ) 
(0.0  ) 
(0.05) 
(0.05) 

M     

ML  

MLP  

205 
206 
207 
208 

0                   

2.6 
4.6 
3.6 
3.8 

4.2 
5.2 
5.2 
6.0 

0.3 
0.5 
4.5 
13.0 

8.2 
8.2 
12.0 
11.8 

(0.07) 

R             

RL                     .    . 

RLP  

209 
210 

RLPK          

4.0 
1.2 

4.8 
2.2 

15.0 
0.5 

11.2 

7.4 

(6.'i4) 

0  

Cow- 
peas2 

Wheat* 

Corn 

Soy- 
beans 

Oats 

Corn 

301 
302 
303 
304 

0    .           

0.3 
0.2 
0.5 
1.3 

23.2 
26.0 
25.6 

22.2 

(   -09) 
(  -09) 
(  -18) 
(   .24) 

6.6 
6.2 
20.3 
26.2 

2.0 
7.4 
11.0 
12.6 

M  

ML  

MLP  

305 
306 
307 
308 

0                 

0.7 
2.0 
1.7 

2.8 

16.0 
16.2 
15.8 
16.4 

5.9 
10.3 
18.1 
25.9 

1.4 
2.6 
5.0 
4.0 

R  

RL  

RLP  

309 
310 

RLPK  

5.0 
0.7 

16.6 
12.2 

('05) 

28.4 
5.6 

10.2 
.8 

0  

Cow- 
peas2 

Corn 

Soy- 
beans 

Wheat 

Corn 

Soy- 
beans 

401 
402 
403 
404 

0... 

2.0 
3.8 
1.6 
1.0 

8.3 
(  .74) 
(  -77) 
(  -74) 

1.2 
2.3 

2.8 
9.2 

8.6 
9.6 
5.2 
2.6 

(0) 
(   -26) 
(   -22) 
(   .14) 

M      

ML  

MLP  

405 
406 
407 
408 

0  

1.4 
0.6 
0.2 
0.0 

7.0 
7.8 
8.2 
8.2 

.7 
.5 
1.5 
7.3 

2.6 
2.4 
1.2 
.4 

(  -07) 

R  

RL  

RLP  

409 
410 

RLPK  

0.2 
0.0 

8.5 

5.8 

13.2 
0.3 

.8 
.6 

("02) 

0  

*No  treatment.     2Plot  yields  not  taken.     "Eesidues  and  lime  only.     4No  ma- 


nure. 


1919} 


ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


451 


ES  44a. — NEWTON  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS  IN 
SOIL  EXPERIMENTS 


Serial 
plot 
No. 

Soil  treatment  app'ied 

Average  annual  yields  —  bushels  or 
(tons)  per  acn 

Cora 
7  crops 

Soybeans 
6  crops 

Wheat 
4  crops1 

1 
2 
3 
4 

0.  . 

7.0 
9.G 
10.9 
10.6 

•    (   -30) 
(  -41) 
(   -50) 
(  .49 

.4 
.9 
5.i 
11.6 

M  

ML  

MLP  

5 
6 

7 
8 

0  

5.9 
6.1 

7.6 

7.9 

3.0 
2.9 
3.1 
3.7 

2.2 
1  1 
4.8 
11.4 

R  

RL  

RLP  

9 
10 

RLPK   

8.8 
3.6 

3.2 

(   .25) 

13.0 
.2 

0  

GENERAL  NOTES  FOR  NEWTON  FIELD. — On  Series  100,  200,  and  300  the  rota- 
tion is  corn  with  legume  cover  crop,  soybeans  or  cowpeas,  and  wheat  with  legume 
cover  crops.  These  three  series  are  tile-drained.  The  same  rotation  is  practiced 
on  Series  400  but  without  tile  drainage.  The  soil  treatment  on  these  four  series 
is  standard,  as  described  in  the  introduction.  Dolomitie  limestone  is  used  at  the 
rate  of  1,000  pounds  per  acre  per  year,  the  fineness  being  from  10-mesh  down; 
that  is,  the  total  product  passing  thru  a  sieve  with  10  meshes  to  the  inch. 

Series  500,  600,  700,  800,  900,  and  1,000  (see  Table  45)  are  used  primarily 
to  determine  the  effectiveness  of  different  forms,  kinds,  amounts,  and  degrees 
of  fineness  of  lime.  The  odd-numbered  series  (500,  700,  900)  receive  applications 
of  high-calcium  limestone  or  burnt  lime,  and  the  even-numbered  series  (600,  800, 
1,000)  receive  dolomitic  limestone  or  burnt  lime.  Plots  2,  3,  4,  5,  and  6  on  all 
series  receive  500  pounds  per  acre  per  year;  Plots  8,  9,  10,  11,  and  12  receive 
1,000  pounds;  and  Plots  14,  15,  16,  17,  and  18  receive  2,000  pounds;  all  applica- 
tions being  based  upon  the  equivalent  of  pure  calcium  carbonate.  The  rotation 
of  these  plots  is  the  same  as  indicated  above,  and  apart  from  the  lime  the  soil 
treatments  are  standard.  The  main  tile  drain  runs  between  Plots  16  and  17 
across  Series  500  to  1,000,  thru  a  strip  of  low  ground,  and  the  nearby  plots, 
especially  Nos.  17  and  18  appear  to  be  naturally  more  productive  than  the  average. 

*No  manure  on  1914  wheat. 


452 


BULLETIN  No.  219 


[May, 


TABLE  45. — NEWTON  FIELD:  CROP  YIELDS  IN  LIME  EXPERIMENTS 


Plot 
No. 

Soil 
treatment 
applied 

Limestone 
fineness, 
meshes 
per  inch 

1912 
Corn1 

1913 
Soy- 
beans2 

1914 
Wheat 

1915 
Corn 

1916 
Soy- 
beans 

1917 
Wheat 

Bushels  per  acre 

501 
502 
503 
504 
505 
506 

RPK 

15.4 
18.8 
19.0 
20.0 
18.4 
18.4 

4.3 
4.3 
3.7 
3.3 
3.5 
3.2 

4.7 
5.7 
5.8 
5.2 
4.7 
5.2 

7.8 
15.4 
13.0 
15.0 
12.0 
8.4 

3.2 
6.7 
5.5 
5.5 
4.5 
3.5 

9.0 
19.5 
15.0 
18.3 
17.7 
16.2 

RPKL 

t  down  

RPKL  
RPKL  

I  to  10  

10  down  
50  down.  .  .  . 
Burnt  

RPKL  

RPKL  

507 
508 
509 
510 
511 
512 

RPK 

16.0 
19.6 
18.8 
17.0 
14.0 
19.8 

3.0 
3.2 
4.0 
3.2 
5.0 
4.5 

3.5 
4.8 
3.2 
4.5 
,6.3 
4.8 

2.2 
7.4 
7.2 
9.8 
10.2 
7.8 

1.7 
4.2 
4.2 
6.0 
5.7 
6.0 

7.8 
16.0 
17.2 
19.5 
18.3 
18.5 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL 

10  down.  .  .  . 
50  down.  .  .  . 
Burnt  

RPKL  

RPKL  

513 
514 
515 
516 
517 
518 
519 

RPK 

11.4 
14.2 
15.4 
14.8 
13.0 
11.6 
11.0 

4.7 
4.2 
4.2 
4.8 
3.5 
4.5 
4.0 

2.3 
6.8 
4.0 
8.8 
9.2 
11.5 
1.5 

3.0 
13.4 
11.4 
16.4 
14.8 
12.0 
2.8 

3.3 
9.2 

8.2 
8.0 
8.7 
8.3 
1.3 

6.5 
21.2 
18.3 
23.5 
25.7 
21.5 
6.5 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down  
50  down.  .  .  . 
Burnt  

RPKL  

RPKL  

RPK  

Corn1 

Soy- 
beans2 

Wheat 

Corn 

Soy- 
beans 

Wheat 

601 
602 
603 
604 
605 
606 

RPK 

• 

22.0 
25.6 
25.6 
22.0 
18.8 
13.8 

3.0 
2.0 
3.2 
2.5 
3.7 
1.7 

2.5 
5.0 
16.8 
9.2 
4.8 
2.3 

4.0 
13.4 
17.6 
17.0 
12.8 
7.6 

4.7 
8.0 
9.5 
5.8 
3.5 
3.3 

3.2 
22.8 
26.5 
24.5 
18.5 
17.2 

RPKL 

4  down  

RPKL 

4  to  10 

RPKL  

10  down.  .  .  . 
50  down  .  . 

RPKL 

RPKL  

Burnt  

607 
608 
609 
610 
611 
612 

RPK 

16.2 
13.4 
13.8 
15.8 
12.0 
10.6 

1.8 
1.2 
1.2 
1.2 
1.7 
2.5 

2.3 
1.5 
1.5 
1.7 
1.5 
1.8 

1.4 
5.0 
5.2 
6.0 
5.6 
3.8 

2.0 
3.7 
3.2 
3.7 
3.2 
3.0 

11.3 
15.3 
11.8 
16.8 
13.3 
12.7 
7.2 
20.0 
16.5 
20.3 
22.2 
16.7 
52 

RPKL.      .    . 

4  down  

RPKL. 

4  to  10  

RPKL  

10  down  
50  down.  .  .  . 
Burnt  

RPKL  

RPKL  

613 
614 
615 
616 
617 
618 
619 

RPK 

12.6 
12.0 
11.0 

8.2 
8.4 
7.0 
7.0 

1.5 
2.2 
1.3 
2.0 
2.2 
4.2 
3.3 

1.3 
2.2 
2.3 
4.2 
5.7 
8.5 
6.3 

1.0 
7.4 
8.8 
16.4 
17.8 
12.8 
3.6 

2.2 
5.8 
6.5 
5.8 
6.8 
7.3 
4.2 

RPKL.  .. 

4  down  
4  to  10  

RPKL  .  . 

RPKL  

10  down.  .  .  . 
50  down  
Burnt  

RPKL  

RPKL  

RPK  

NOTE. — See  "general  notes,"  Table  44a,  preceding  page,  for  explanation  of 
limestone  treatment. 

*No  treatment.    2No  phosphorus  or  potassium. 


1910} 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


453 


TABLE  45. — NEWTON  FIELD,  Continued 


Plot 
No. 

Soil 
treatment 
applied 

Limestone 
fineness, 
meshes 
per  inch 

1912 
Cow- 
peas1.2 

1913 
Corn 

1914 

Soy- 
beans 

1915 
Wheat 

1916 
Corn 

1917 

Soy- 
beans2 

Bushels  per  acre 

701 
702 
703 
704 
705 
706 

RPK.  . 

2.0 
1.6 
1.6 
2.8 
1.0 
.2 

9.8 
11.0 
10.7 
10.2 
9.7 
10.2 

7.0 
17.3 
14.7 
18.8 

18.7 
18.7 

9.8 
12.6 
11.4 
11.4 
8.8 
6.8 

••'•' 

RPKL  

4  down 

RPKL  

4  to  10     . 

RPKL  

10  down 

RPKL  

50  down 

RPKL  

Burnt  

707 
708 
709 
710 
711 
712 

RPK.  . 

.2 
.2 
.2 
.2 
.4 
.2 

9.5 
11.5 
11.5 
13.2 
11.2 
12.0 

10.3 
16.0 
13.5 
16.5 
17.0 
18.8 

4.8 
5.4 
4.4 
3.8 
3.2 
3.4 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.  .  .  . 

RPKL  . 

50  down  .  . 

RPKL  

Burnt  

713 
714 
715 
716 
717 
718 
719 

RPK 

.4 
.2 
.4 
.2 
.4 
.8 
.4 

10.5 
12.5 
11.3 
11.7 
14.7 
12.3 
7.7 

4.0 
16.7 
15.3 
17.5 
23.8 
23.3 
5.7 

3.2 
1.8 
2.6 
3.0 
4.8 
6.4 
6.0 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL   

10  down.  .  .  . 

RPKL 

50  down.  .  .  . 

RPKL 

Burnt  

RPK  

Cow- 
peas1.2 

Corn 

Soy- 
beans 

Wheat 

Corn 

Soy- 
beans 

801 
802 
803 
804 
805 
806 

RPK.  . 

.2 
.2 
2 
.0 
.4 
.4 

9.8 
10.2 
8.3 
10.2 
9.0 
10.0 

11.2 
14.0 
11.8 
13.7 
12.8 
17.5 

3.4 
3.2 
4.2 
3.4 
5.4 
8.4 

RPKL  

4  down  .  .  . 

RPKL  

4  to  10. 

RPKL  

10  down.  .  . 

RPKL  

50  down 

RPKL  

Burnt  

807 
808 
809 
810 
811 
812 

RPK.  . 

.4 
.2 
.4 
.4 
.2 
.2 

8.8 
10.3 
11.2 
11.2 
11.2 
10.7 

6.0 
16.3 
12.2 
17.0 
19.5 
23.7 

6.0 
8.8 
8.8 
8.4 
7.0 
8.4 

_^^ 

RPKL  

4  down  

RPKL   
RPKL  

4  to  10  

10  down.  .  . 

RPKL  

50  down.  .  .  . 

RPKL    

Burnt  

813 
814 
815 
816 
817 
818 
819 

RPK 

.4 
.2 
.4 
.4 
.4 
1.8 
3.0 

9.5 
11.3 
11.0 
12.2 
14.0 
15.0 
7.7 

5.0 
19.0 
12.8 
18.3 
26.0 
30.2 
7.2 

5.4 
4.8 
6.6 
6.2 
7.4 
10.2 
96 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.  .  .  . 

RPKL...      . 
RPKL  

50  down.  .  .  . 

Burnt  

RPK  

Phosphorus  and  potassium  only.    ''Crop  failure. 


454 


BULLETIN  No.  219 


[May, 


TABLE  45. — NEWTON  FIELD,  Concluded 


Plot 
No. 

Soil 
treatment 
applied 

Limestone 
fineness, 
meshes 
per  inch 

1912 
Cow- 
peas1-2 

1913 
Wheat 

1914 
Corn 

1915 
Soy- 
beans2 

1916 
Wheat2 

1917 
Corn 

Bushels  per  acre 

901 
902 
903 
904 
905 
906 

RPK 

4.5 
6.3 
7.5 
7.0 
8.0 
9.3 

6.4 
13.4 
17.6 
18.8 
21.6 
19.6 

4.2 
4.4 
2.8 
2.6 
4.0 
4.6 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.  .  .  . 

RPKL  

50  down  .... 

RPKL  

Burnt  

907 
908 
909 
910 
911 
912 

RPK  

8.0 
9.0 
9.0 
9.2 
12.2 
11.3 

17.2 
20.0 
19.4 
15.2 
11.4 
10.2 

2.2 
4.8 
1.6 
3.4 
4.4 
6.6 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL 

10  down  .... 

RPKL 

50  down.  .  .  . 

RPKL  

Burnt  

913 
914 
915 
916 
917 
918 
919 

RPK 

. 

8.5 
10.0 
8.2 
12.8 
13.5 
14.2 
8.5 

12.8 
14.2 
15.0 
16.8 
9.6 
17.2 
29.8 

3.2 
7.8 
6.6 
9.0 
10.8 
12.0 
4.8 

RPKL 

4  down  

RPKL  

4  to  10  

RPKL  

10  down  .... 

RPKL  

50  down  .... 

RPKL.      .. 

Burnt  

RPK  

Cow- 
peas1.2 

Wheat 

Corn 

Soy- 
beans2 

Wheat2 

Corn 

1001 
1002 
1003 
1004 
1005 
1006 

RPK 

12.2 
12.3 
13.3 
12.3 
11.2 
13.5. 

12.4 
17.6 
22.6 
23.4 
21.6 
20.6 

4.4 
4.2 
4.8 
5.2 
52 
7.2 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.  .  .  . 

RPKL  

50  down.  .  .  . 

RPKL  

Burnt  

1007 
1008 
1009 
1010 
1011 
1012 

RPK 

13.7 
15.7 
14.0 
13.0 
12.5 
12.7 

28.0 
35.0 
30.0 
24.6 
13.2 
13.8 

5.4 
9.0 
3.4 
2.8 
3.2 
3.4 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.   .  . 
50  down 

RPKL. 

RPKL  

Burnt  

1013 
1014 
1015 
1016 
1017 
1018 
1019 

RPK 

12.0 
13.8 
15.2 
19.0 
17.2 
16.2 
17.2 

14.0 
13.8 
17.2 
18.8 
14.0 
22.6 
28.2 

2.8 
6.8 
10.0 
16.2 
10.4 
11.8 
5.4 

RPKL  

4  down  

RPKL  

4  to  10  

RPKL  

10  down.  .  .  . 

RPKL  

50  down  .... 

RPKL  

Burnt  

RPK  

JNo  treatment.    'Crop  failure. 


1919] 


ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


TABLE  46.— OBLONG  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY,  PRAIRIE:  LOWER  ILLINOISAN  GLACIATION 


Plot 

No. 

Soil 
treatment 
applied 

1912 
Oats1 

1913 
Clover2 

1914 
Wheat 

1915 
Corn 

1916 
Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0    . 

12.0 
23.0 
24.2 
25.0 

(0.0  ) 

(  .27) 
(  -32) 
(  -33) 

4.6 
25.0 

26.8 
28.8 

31.5 
45.3 
51.8 
51.5 

13.1 
23.9 
30.8 
31.1 

(0.0  ) 
(  -43) 
(  .90) 
(1.15) 

M  

ML  

MLP  

105 
106 
107 
108 

0.. 

22.7 
24.7 
26.7 
29.2 

0.0 
0.0 
.25 
.50 

7.5 
8.3 
21.7 
26.2 

28.4 
30  9 
42.3 
49.4 

6.7 
16.4 
30.2 
38.1 

0.0 
0.0 
2.92 
2.50 

R           

RL               

RLP  

109 
110 

RLPK     

31.2 
25.0 

.33 

(0) 

30.2 
5.3 

56.5 
23.3 

36.2 
6.2 

3.50 
(0.0  ) 

0  

Corn1 

Oats2 

Soy- 
beans2 

Wheat2 

Corn 

Oate 

201 
202 
203 
204 

0... 

14.2 
27.3 
46.3 
58.6 

1.2 
1.7 

7.5 

7.2 

4.6 
(   -64) 
(  -95) 
(   -86) 

9.2 
10.8 
11.1 
16.2 

11.3 
19.0 
33.0 
34.6 

36  6 
52.3 
59.4 
64.7 
49.2 
52.3 
62.2 
67.0 

M  

ML  

MLP  

205 
206 
207 
208 

0...    . 

45.3 
37.7 
45.7 
49.3 

5.5 
6.4 
6.9 
5.2 

7.4 
7.0 
7.9 
7.1 

5.7 
8.8 
10.2 
13.7 

20.9 
23.4 
29.9 
26.9 

R  

RL  

RLP  

209 
210 

RLPK.. 

53.9 
43.7 

5.2 
1.9 

7.8 
6.9 

15.8 
3.1 

32.6 
12.4 

67.7 
36.1 

0  

Wheat1 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0... 

12.6 
11.9 
11.2 
10.1 

11.6 

14.8 
19.7 
21.9 

(1.09) 
(1.44) 
(1.64) 
(1.85) 

17.1 
29.3 

48.4 
50.7 

M  

ML  

MLP  

305 
306 
307 
308 

0... 

14.5 
9.5 
10.0 
10.9 

12.3 
22.5 
26.9 

27.8 

14.3 
13.9 
15.8 
13.8 

21.4 
28.7 
36.1 
42.6 

R  

RL  

RLP  

309 
310 

RLPK  

12.8 
14.4 

31.9 
13.4 

15.8 
(1.49)8 

55.9 
29.4 

0  

Soy- 
beans1 

Wheat2 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0... 

(   -42) 
(  -45) 
(   -55) 
(  -71) 

.8 
1.5 
3.9 
6.9 

15.2 
16.5 
16.4 
20.1 

28.3 
43.4 
58.6 
57.0 

(  .45) 
(   -64) 
(1.15) 
(1.52) 

7.5 
16.9 
21.0 
30.1 

M  

ML  

MLP  

405 
406 
407 
408 

0... 

7.7 
8.2 
10.6 
11.1 

3.1 
3.2 
6.4 
10.7 

20.1 
23.7 
27.8 
30.2 

39.4 
36.1 
48.6 
60.3 

.50 
.40 
1.42 
3.33 

14.4 
20.4 
28.2 
35.3 

R.... 

RL... 

RLP  

409 
410 

RLPK.... 

11.9 

(   .85) 

14.7 
1.2 

27.6 

17.2 

59.7 
29.2 

2.92 
(   -44) 

31.4 
13.4 

0  

manure  or  residues.     2No  manure.    'Estimated. 


456 


BULLETIN  No.  219 


[May, 


TABLE  47. — OBLONG  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
4  crops 

Wheat 
4  crops1 

Clover 
2  crops 

Soybeans 
2  crops1 

1 

2 
3 
4 

0.  . 

17.6 
24.4 
32.2 
33.4 

22.4 
33.6 
42.1 
43.7 

5.3 
13.2 
14.7 

18.8 

(  -22) 
(  -53) 
(1.02) 
(1.33) 

(  -79) 
(1.04) 
(1.30) 
(1.36) 

M  

ML  

MLP  

5 

6 

7 
8 

0.  . 

21.1 
23.2 
29.2 
32.0 

26.9 
31.8 
42.0 
48.3 

6.9 
9.4 
15.0 

18.8 

.25 
.20 
2.17 
2.91 

10.9 
10.4 
11.9 
10.4 

R  

RL  

RLP  

9 
10 

RLPK  

37.1 
19.3 

48.9 
21.2 

19.3 
5.4 

3.21 

(  -22) 

11.8 
(1  •  18) 

0  

NOTE. — The  crop  rotation  and  soil  treatment  are  standard,  as  described  in 
the  introduction. 

*No  manure  on  1914  soybeans  nor  on  1915  wheat. 


1919} 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


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1919]  ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS  459 


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460 


BULLETIN  No.  219 


[May, 


TABLE  48b. — ODIN  FIELD:  SOIL  EXPERIMENTS;  GENERAL  SUMMARY 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
15  crops 

Wheat 
15  crops 

Peas  or 
beans 
15  crops 

Clover 
3  crops 

Cowpea 
hay 
9  crons 

Oats 
2  crops 

Land  Not  Tile-drained 


1 

0      

27  1 

10  4 

6  9 

14 

(     54) 

25  8 

2 

R  

27.4 

10.0 

8.2 

.41 

•  (   -58) 

28  0 

3 

RL  

29.7 

16.6 

9.4 

.56 

1   .54) 

35  9 

4 

RLP  

30.7 

22.3 

9.3 

.56 

(    60) 

39  5 

5 

RLPK  

48.5 

25.6 

11.5 

.30 

(1.13) 

35.8 

Land  Tile-drained 


6 

0  

20.8 

8.6 

5.7 

.15 

(   .50) 

25  0 

7 

R  

25.8 

11.9 

6.4 

.25 

(  -59) 

29  0 

8 

RL  

31  5 

16  9 

9.6 

.51 

(    60) 

37  7 

9 

RLP  

33.3 

23  8 

8  9 

.47 

(    69) 

35  6 

10 

RLPK  

44.9 

25.8 

11.2 

.33 

(1.13) 

27.1 

Phosphate  Experiments 


Plot 
No. 

Soil  treatment  applied 

Timothy 
&  clover 
hay 
8  crops 

Corn 
2  crops 

Oats 
2  crops 

501W 
501  E 

502W 
502  E 

503W 
503  E 

504W 
504  E 

505W 
505  E 

506W 
506  E 

RK(bP).. 

(1-11) 
(1.35) 

(  .78) 
(1.04) 

(  .91) 
(1.11) 

(  .85) 
(1.21) 

(   .72) 
(1.03) 

(  -93) 

(1.21) 

20.9 
24.0 

21.0 
23.2 

19.9 
20.9 

17.0 
23.7 

16.0 
21.7 

17.9 
23.6 

65.0 
60.4 

53.4 
53.7 

65.7 
51.7 

65.1 
59.4 

48.0 
58.4 

62.8 
71  1 

RKL(bP)  

RK.. 

RKL  

RK(aP)  .  .  . 

RKL(aP)  

RK(rP)  .  . 

RKL(rP)  

RK.. 

RKL  

RK(sP)  .  . 

RKL(sP)  

1919] 


ILLINOIS  CROP    YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


461 


TABLE  49. — ODIN  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS,  THREE-  AND 

FOUR -YEAR  SWEET-CLOVER  ROTATIONS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY;  LOWER  ILLINOISAN  GLACIATION 


Year 

1906 
1907 
1908 
1909 
1910 
1911 
1912 
1913 
1914 
1915 
1916 
1917 

Soil 
treatment 
applied 

Three-year  rotation             |           Four-year  rotation 

Corn 

Soy- 

bflkns 

Wheat 

Corn 

Soy- 
beans 

Wheat 

Sweet 
Clover 

Bushels  or  (tons)  per  acre 

RLP.  . 

38.3 
46.8 
49.0 
24.4 
32.7 
25.3 
64.4 
7.3 
7.3 
42.0 
18.4 
14.0 

(1.90)1 
(1.27)1 
9.6 
.7 
3.9 
8.0 
11.1 

(2) 
2.2 
1.7 
.6 
5.0 

28.3 
24.0 
30.7 
23.3 
39.  43 
12.8 
(2) 
22.7 
12.8 
27.8 
2.2 
10.0 

24.0 
51.5 
58.3 
39.2 
41.3 
59.5 
68.4 
10.3 
2.0 
59.7 
19.8 
19.7 

(1.60)» 
(1.39)1 
8.8 
1.5 
5.0 
7.1 
18.6 
3.9 
4.4 
1.7 
8.0 
11.1 

32.7 
30.0 
27.7 
25.5 
70.  33 
17.2 

2 

40  '« 
23.3 
24.7 
2.2 
39.2 

(4) 
(4) 
(4) 
(4) 
6.90 
3.60 
(4) 
(4) 

".S3 
2.78 
1.25 

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

RLP  

Average  

29.9 

4.3 

17.7 

37.6 

7.0 

23.9 

Number  of  years 
averaged  

12 

10 

11 

12 

10 

11 

GENERAL  NOTES. — The  rotation  followed  on  these  plots  is  corn,  soybeans,  and 
wheat  with  sweet-clover  seeding.  In  the  three-year  rotation  the  sweet  clover  is 
not  allowed  to  stand  over  the  next  year,  but  is  plowed  for  corn  the  year  after  seed- 
ing. In  the  four-year  rotation  the  sweet  clover  is  allowed  to  stand  over  as  a  regular 
crop,  to  be  followed  by  corn.  All  residues  produced  are  returned  to  the  land,  and 
limestone  at  the  rate  of  1,000  pounds  per  acre  per  year  and  steamed  bone  mealat 
the  rate  of  200  pounds  per  acre  per  year  are  applied  for  the  wheat. 

'Cowpeas.  2Not  harvested.  3Oats;  wheat  destroyed  by  grasshoppers. 
4 No  yields;  sweet  clover  plowed  under. 


BULLETIN  No.  219 


TABLE  50. — OQUAWKA  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
DUNE  SAND;  TERRACE 


Plot 
No. 

Soil 
treatment 
applied 

19141 
Corn 

1915 
Soybeans2 

1916 
Wheat 

1917 
Sweet  clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0.  .               

25.3 
21.0 
17.1 
23.5 

(1..  16) 
(1.24) 
(1.38) 
(1.53) 

10.4 
13.1 
12.8 
14.2 

(0.0  ) 
(0.0  ) 
(1.03) 

(1.47) 

M    

ML          

MLP  

105 
106 
107 
108 

0 

22.7 
24.6 
21.9 
24.1 

8.2 
8.5 
9.3 
10.0 

14.3 
13.1 
12.2 
15.8 

0.0 
0.0 
1.39 

1.48 

R  

RL  

RLP  

109 
110 

RLPK 

26.6 
19.2 

11.7 

(1.21) 

10.2 
8.5 

2.52 
(0.0  ) 

0  

Rye 

Corn 

Soybeans 

Wheat 

201 
202 
203 
204 

0.  . 

6.8 
6.5 
6.7 

7.4 

5.0 
11.8 
14.6 
14.0 

(  -28) 
(  -31) 
(  -48) 
(  -57) 

0 
0 
0 
0 

M  

ML  

MLP  

205 
206 
207 
208 

0.  . 

7.0 
6.6 
6.2 
6.4 

7.1 
12.9 
9.2 
12.1 

1.0 
1.4 

2.2 
1.8 

0 
0 
0 
0 

R  

RL  

RLP  

209 
210 

RLPK...  

4.9 
6.2 

8.3 
3.5 

2.0 

(  -22) 

0 
0 

0  ,  

Cowpeas 

Rye2 

Corn 

Soybeans 

301 
302 
303 
304 

0.  . 

(   -50) 
(   -54) 
(   -54) 
(   -55) 

23.9 
21.0 
20.7 
23.4 

14.5 
12.7 
13.2 
13.0 

(1-48) 
(1.62) 
(1-70) 

(1.56) 

M  

ML  

MLP....  

305 
306 
307 
308 

0  

3.5 
3.6 

4.8 
4.5 

19.1 
21.2 
21.7 
21.8 

11.8 
13.0 
12.6 
12.1 

7.0 
4.3 

8.2 
8.2 

R  

RL  

RLP  

309 
310 

RLPK  

4.3 
3.9 

21.6 
18.6 

12.1 

7.5 

9.6 

(1.18) 

0  

Wheat 

Cowpeas2 

Rye2 

Corn 

401 
402 
403 
404 

0.  . 

6.2 
5.4 
6.0 

7.8 

(1.28) 
(1.44) 
(1-51) 
(1.53) 

21.2 
23.2 
25.0 
26.3 

24.6 
30.8 
32.4 
34.1 

M  

ML  

MLP  

405 
406 
407 
408 

0.  . 

7.2 
7.9 
7.1 
5.8 

7.8 
7.9 
8.3 
8.7 

19.1 
21.1 
22.0 
21.9 

24.2 
26.1 
28.5 
24.2 

R  

RL  

RLP  

409 
410 

RLPK  

6.8 
7.0 

9.4 

(1.22) 

21.1 
17.4 

24.9 
21.0 

0  

only.    2No  manure. 


1919} 


ILLINOIS   CROP  YIELDS   FROM    SOIL   EXPERIMENT   .FIELDS 


463 


TABLE  50. — OQUAWKA  FIELD,  Concluded 


Plot 

Ttfn 

Soil 
treatment 

1914 
Soybeans 

1915 
Wheat 

1916 
Cowpeas 

1917 
Rye 

applied 

Bushels  or  (1 

ons)  per  acre 

501 

0.  . 

(   -21) 

4.8 

(   .46) 

11.2 

502 

M  

(   .22) 

6.2 

(   -40) 

13.5 

503 

ML  

(  .22) 

10.1 

(  -45) 

14.9 

504 

MLP  

(  -23) 

10.9 

(  -43) 

12.9 

505 

0  

.7 

4.6 

2.0 

12.1 

506 

R  

.8 

8.3 

2.2 

17.2 

507 

RL  

.8 

8.2 

.6 

17.8 

508 

RLP  

.8 

11.5 

.3 

18.2 

509 

RLPK  

1.2 

10.1 

.3 

18.8 

510 

0  

(   .22) 

8.2 

(   .40) 

14.9 

GENERAL  NOTES. — The  rotatioR  consists  of  corn  with  catch  crop  of  sand  vetch 
on  residue  plots,  soybeans,  wheat,  sweet  clover,  and  rye,  with  catch  crop  of 
alsike  and  sweet  clover  seeded  on  residue  plots.  The  soil  treatment  is  standard, 
as  described  in  the  introduction.  A  sixth  series  is  included  in  this  field,  on 
which  alfalfa  is  being  started. 


TABLE  51. — PAN  A  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
(See  Note  to  Table  52);  MIDDLE  ILLINOIS  AN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

19121 
Oats 

1913 
Clover2 

1914 
Wheat3 

1915 
Corn 

1916 

Oats 

1917 
Clover 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0... 

(   .55) 
(  -44) 
(   -38) 
(   -43) 

41.8 
40.7 
42.1 
42.7 

20.7 
26.8 
27.7 
27.6 

53.6 
51.6 
58.9 
55.8 

(2.30) 
(2.45) 
(2.19) 

(2.21) 

M  

ML  

MLP  

105 
106 
107 
108 
109 
110 

0  

.50 
1.08 
.92 
.58 
.92 
(  .38) 

39.7 
41.1 
43.3 
41.8 
42.1 
39.3 

24.2 
24.1 
28.0 
25.8 
28.9 
23.8 

51.6 
50.6 
57.2 
53.3 
55.0 
52.2 

.58 
.68 
.50 
.67 
.83 
(2.33) 

R  

RL  

RLP  

RLPK  

0  

111 
112 
113 
114 
115 
116 

CvM.. 

(  .38) 
(   -34) 
(  -41) 
(   -46) 
C-71) 
(   .63) 

39.2 
39.4' 
33.9 
39.8 
31.5 
36.2 

23.0 
27.4 
30.7 
25.6 
30.7 
31.1 

54.7 
50.3 
56.1 
60.5 
56.1 
46.1 

(2.10) 
(2.05) 
(2.46) 
(2.28) 
(2.13) 
(2.19) 

CvML  

CvMLP  

CvMP  

0  

0  

Corn 

Oats3 

Clover" 

Wheat3 

Corn 

Oats 

201 
202 
203 
204 

0... 

23.6 
24.0 
21.0 
21.3 

11.1 
11.1 
11.4 
11.7 

(   -41) 
(   -40) 
(  -57) 
(   -67) 

26.1 
29.2 
34.2 
34.8 

21.8 
18.9 
21.0 
22.2 

83.8 
79.2 
96.7 
90.6 

M  

ML  

MLP  

205 
206 
207 
208 
209 
210 

0.  . 

24.2 
26.4 
26.3 
27.9 
27.6 
28.8 

11.4 
10.6 
11.4 
12.0 
11.4 
13.4 

.33 
.83 
1.17 
1.33 
1.50 
(  .81) 

29.5 
31.8 
33.5 
36.0 
36.3 
36.4 

13.8 
20.5 
31.7 
31.4 
35.2 
21.2 

90.5 
93.8 
94.8 
98.0 
98.6 
88.1 

R.. 

RL  

RLP  

RLPK  

0  

211 
212 
213 
214 
215 
216 

CvM.. 

28.7 
25.9 
31.0 
31.5 
30.1 
26.3 

9.5 
12.3 
10.6 
10.2 

8.4 
11.7 

(   -93) 
(1.04) 
(1.32) 
(1.08) 
~  (  .93) 
(   .83) 

36.1 
35.4 
36.2 
35.5 
37.9 
38.7 

19.8 
27.8 
31.3 
27.1 
28.8 
26.3 

99.4 
94.7 
99.5 
100.8 
91.9 
91.9 

CvML  

CvMLP  

CvMP  

0  

0  

1No  soil  treatment;  oat  yields  not  taken.    2No  organic  manure.     8No  manure. 


464 


BULLETIN  No.  219 


[May, 


TABLE  51. — PAN  A  FIELD,   Concluded 


Plot 
No. 

Soil 
treatment 
applied 

19121 
Oats 

1913 
Corn 

1914 
Oats 

1915 
Clover 

1916 
Wheat 

1917 
Corn 

Bushels  or  (tons)  per  acre 

301 
302 
303 
304 

0... 

29.5 
28.4 
28.9 
33.7 

10.2 
6.7 
10.2 
4.5 

(2.87)1 
(3.43) 
(3.75) 
(3.43) 

12.6 
12.9 
14.0 
8.0 

44.9 
47.5 
49.5 
44.7 

M  

ML  

MLP  

305 
306 
307 
308 
309 
310 

0.  . 

28.6 
31.8 
34.4 
34.0 
35.3 
29.7 

4.5 
6.4 
8.1 
11.2 
10.0 
10.5 

1.67 
1.67 
1.58 
1.83 
1.75 
(3.80) 

7.5 
10.8 
11.3 
10.0 
17.1 
8.4 

35.9 
48.0 
49.3 
53.5 

54.7 
47.2 

R     

RL  

RLP  

RLPK  

0  

311 
312 
313 
314 
315 
316 

CvM.  . 

21.8 
24.5 
21.5 
19.9 
25.8 
26.1 

12.0 
11.7 
11.7 
10.5 
6.4 
6.4 

(3.91) 
(3.79) 
(3.58) 
(3.96) 
(3.69) 
(3.62) 

17.8 
9.2 
12.0 
11.1 
9.8 
13.3 

52.4 
51.4 
50.0 
42.2 
42.7 
43.6 

CvML  

CvMLP  

CvMP  

0      

0  

Soybeans 

Wheat3 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0... 

(1.52) 
(1.67) 
(1.44) 
(1.41) 

19.7 
16!5 
17.7 
15.0 

17.1 
15.4 
17.0 
13.5 

41.1 
51.1 
55.0 
55.9 

(1.01) 

(1.40) 
(2.44) 
(2.38) 

11.8 
12.2 
25.8 
32.8 

M  

ML  

MLP  

405 
406 
407 
408 
409 
410 

0  

9.0 
11.5 
8.4 
11.3 
9.3 
(1-70) 

11.9 
16.6 
17.6 
23.4 
21.2 
24.8 

10.7 
12.2 
24.7 
28.9 
28.4 
21.6 

55.9 
37.8 
64.2 
61.1 
70.5 
59.2 

1.58 
2.25 
2.42 
2.08 
2.00 
(2.27) 

13.0 
20.7 
31.7 
44.2 
38.7 
12.2 

R  

RL  

RLP  :.. 

RLPK  

0  

411 
412 
413 
414 
415 
416 

CvM.. 

(1.54) 
(1.59) 
(1.64) 
(1.59) 
(1.58) 
(1.44) 

24.2 
21.8 
25.3 
14.2 
20.1 
15.7 

24.5 
21.9 
23.3 
19.4 
17.0 
18.1 

66.7 
56.9 
68.1 
54.1 
63.3 
55.6 

(2.21) 
(2.66) 
(2.51) 
(2.14) 
(1.82) 
(1-54) 

22.2 
26.6 
36.5 
35.2 
13.5 
12.6 

CvML  

CvMLP..  

CvMP  

0  

0  

Alfalfa* 

Alfalfa* 

Alfalfa4 

Alfalfa* 

Alfalfa* 

501 
502 
503 
504 

0..                                    ..... 

(1.88) 
(1.59) 
(3.46) 
(3.73) 

(   -16) 
(  -60) 

(2.55) 
(2.62) 

M  

ML  

MLP  

505 
506 
507 
508 
509 
510 

0.  . 

(1.87) 
(1.92) 
(3.41) 
(3.89) 
(4.10) 
(2.50) 



(   -38) 
(  -51) 
(2.68) 
(3.39) 
(3.45) 
(  -41) 

R  

RL  

RLP  

RLPK  

0  

511 
512 
513 
514 
515 
516 

CvM.. 

(2.74) 
(3.47) 
(3.70) 
(2.63) 
(1.69) 
(1.93) 



(   .35) 
(2.46) 
(2.99) 
(   -04) 
(  -00) 
(   .00) 

CvML  

CvMLP  

CvMP  

0  

0  

*No  soil  treatment;  oat  yields  not  taken.  3No  manure.  *No  cover  crop;  no 
manure  or  residues  on  Plots  2  to  9,  but  15  tons  per  acre  of  manure  was  applied 
to  Plots  11  to  14  in  1912.  Alfalfa  winter-killed  in  1913,  1914,  and  1916. 


1919] 


ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


465 


TABLE  52. — PANA  FIELD^  GENERAL  SUMMARY,  FULLY  TREAT-EC!  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
4  crops 

Wheat 
4  crops1 

Clover 
4  crops1 

1 
2 
3 
4 
5 

0.  . 

26.8 
27.4 
28.8 
28.3 
22.6 

47.2 
47.1 
55.2 
51.7 
50.6 

23.1 
23.8 
29.0 
29.6 
22.4 

(1.65) 
(1.92) 
(2.24) 
(2.17) 
1.04 

M  

ML  

MLP  

0  

6 
7 
8 
9 
10 

R.  . 

27.3 
33.6 
34.7 
36.5 

28.7 

47.1 
55.9 
55.7 
58.5 
52.5 

26.1 
30.0 
33.0 
33.6 
24.1 

1.35 
1.42 
1.48 
1.52 

(2.30) 

RL  

RLP  

RLPK  

0  

11 
12 
13 
14 
15 
16 

CvM.  . 

28.3 
30.6 
31.4 
26.8 
29.0 
29.0 

58.2 
53.4 
58.9 
56.5 
54.2 
50.0 

28.8 
27.7 
27.1 
30.4 
23.2 
25.2 

(2.29) 
(2.39) 
(2.47) 
(2.37) 
(2.14) 
(4.04) 

CvML  

CvMLP  

CvMP  

0  

0  

GENERAL  NOTES. — The  rotation  practiced  is  that  of  wheat  with  legume  cover 
crops  on  the  residue  plots,  corn,  oats,  and  clover.  Alfalfa  is  grown  on  a  fifth 
field  for  five  years  after  which  it  is"  rotated  with  the  other  crops.  The  soil  treat- 
ment is  standard,  as  described  in  the  introduction.  The  soil  is  black  silt  loam 
on  clay  on  Series  100  and  200  and  most  of  300,  and  brown-gray  silt  loam  on 
tight  clay  on  Series  400  and  500. 

lNo  manure  on  1914  wheat  or  clover,  nor  on  1915  wheat. 


466 


BULLETIN  No.  219 


[May, 


TABLE  53. — RALEIGH  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
YELLOW-GRAY  SILT  LOAM,  TIMBER  SOIL;  LOWER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treat- 
ment 
applied 

19101 
Wheat 

1911 
Corn 

1912 
Oats 

1913 
Clover8 

1914 
Wheat 

1915 
Corn 

1916 
Oats 

1917 
Soy- 
beans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

9.5 
6.9 
9.8 
11.6 

28.0 
41.0 

45.8 
46.7 

11.9 
15.2 
23.4 
22.7 

(   -22) 
(   .23) 
(  .72) 
(   -68) 

11.8 
10.9 
27.5 
26.8 

21.4 
35.1 
57.2 
52.3 

10.8 
11.2 
12.0 
14.7 

(   -76) 
(  .94) 
(1.25) 
(1.57) 

M 

ML  

MLP.... 

105 
106 
107 
108 

0   

7.3 
9.0 
11.0 
10.7 

24.9 
24  4 
36.8 
31.1 

14.1 
12.8 
20.9 
23.0 

.02 
.02 
.08 
.01 

9.4 
9.2 
25.1 

27.2 

21.8 
24.4 
43.5 
42.0 

10.9 
11.4 
10.6 
14.7 

3.5 
5.7 
10.4 
12.9 

R  

RL  

RLP  .... 

109 
110 

RLPK.  .  . 

0  

12.7 
5.7 

39.5 

17.8 

25.8 
8.1 

.03 
.01 

30.0 

7.2 

47.2 
22.3 

16.7 
9.2 

9.4 

(  -67) 

Cow- 
peas 

Wheat2 

Corn 

Oats 

Soy- 
beans 

Wheat8 

Corn 

Oats 

201 
202 
203 
204 

0  

(  .86) 
(  -75) 
(1.38) 
(1.35) 

12.1 
12.7 
17.5 
19.0 

20.5 
36.5 
55.1 
53.9 

.6 
2.0 
3.1 
3.0 

(   -28) 
(   -30) 
(   .26) 
(   -23) 

22.9 
34.9 
45.0 
43.2 

17.5 
23.3 
36.1 
36.7 

M  

ML  

MLP.... 

205 
206 
207 
208 

0   . 

(  -71) 

9.5 
12.3 
19.9 

22.7 

20.4 
29.9 
45.2 
55.1 

1.7 
2.0 
4.4 
5.2 

(   -27) 
2.5 
2.5 
2.7 

23.6 
24.7 
40.1 
45.6 

20.3 
25.9 
42.0 
44.8 

R     .      .. 

RL  

RLP  

209 
210 

RLPK.  .  . 
0  

(l'.Q9) 

22.8 
14.7 

56.5 
25.2 

7.2 
2.7 

1.8 
.7 

46.8 
30.0 

47.7 
30.2 

Oats 

Clover2 

Wheat2 

Corn 

Oats 

'Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 
305 
306 
307 
308 

309 
310 

0  

18.1 
17.3 
26  8 
26.0 

(   -44) 
(  -43) 
(   -61) 
(  -68) 

3.4 
2.3 
7.1 

7.8 

5.7 
12.9 
17.2 
17.1 

2.5 
5.0 
8.1 

7.8 

1.1 

(1.81) 
(2.16) 
(2.30) 

.8 
1.8 
7.8 
9.8 

24.4 
44.7 
57.5 
58.9 

M  

ML  

MLP.  .  .  . 

0  

15.0 
20.9 
25.1 
25.1 

(  -23) 

2.0 
2.8 
7.4 
9.9 

4.5 
9.4 
17.5 
17.9 

2.0 
4.1 
9.5 
11.2 

1.0 
.8 
3.4 
3.9 

.2 
.7 
6.7 

7.7 

25.7 
19.9 
45.1 
41.1 

R  

RL  

RLP.... 

RLPK.  .  . 
0  

29.3 
22.9 

14.1 

4.7 

15.9 
7.4 

10.3 
5.0 

3.9 
.4 

6.6 

1.8 

63.4 
35.1 

40T 
402 
403 
404 

Corn 

Oats2 

Cow- 
peas2 

Wheat2 

Corn 

Oats 

Clover 

Wheat 

0.  . 

'  24.1 
18.1 
40.1 
37.4 

25.6 
19.2 
38.0 
35.5 

(1.44) 
(1.05) 
(2.79) 
(2.56) 

6.2 
4.2 
20.7 
23.8 

7.6 
13.2 
16.3 
14.1 

9.7 
8.9 
23.6 

24.7 

(   .56) 
(   -89) 
(1.44) 
(1.98) 

6.3 
7.8 
41.2 
39.2 

M  

ML  

MLP.... 

405 
406 
407 
408 

0.  . 

24.9 
31.1 
42.8 
44.5 

18.4 
24.1 
38.6 
35.3 

(   -93) 

6.4 
8.5 
29.8 
32.9 

8.5 
10.7 
14.4 
16.4 

9.8 
12.8 
23.1 
22.5 

(4) 
(4) 
(4) 

(<) 

11.2 
15.2 
37.2 
40.5 

R  

RL  

RLP.... 

409 
410 

RLPK.  .  . 
0  

43.0 

26.8 

32.8 
25.0 

29.8 
4.7 

16.4 
4.6 

20.8 
7.5 

(4) 
(   .83) 

46.4 
5.3 

lNo  manure  or  residues, 
lost  before  recleaning. 


2No  manure.    "Crop  destroyed  by  hailstorm.     4Se«d 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


467 


TABLE  54. — RALEIGH  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
7  crops 

Oats 
6  crops 

Wheat 
4  crops 

Clover 
2  crops 

1 
2 
3 
4 

0  

18.6 
31.2 
42.0 
40.9 

8.8 
10.9 
17.7 
18.3 

4.7 
5.1 
19.1 
19.0 

(   .39) 
(   -56) 
(1.08) 
(1.33) 

M  

ML  

MLP  

5 

6 

7 
8 

0.  . 

18.5 
20.5 
34.7 
35.6 

9.8 
11.5 
18.4 
20.2 

5.2 
6.3 
17.2 
18.9 

.021 
.021 
.081 
.Oll 

R  

RL  '  

RLP  

9 
10 

RLPK  

40.8 
20.3 

21.4 
10.4 

20.8 
3.7 

.031 

(   .42) 

0  

NOTE. — The  crop  rotation  and  soil  treatment  are  standard,  as  described  in 
the  introduction. 
*One  crop  only. 


468 


BULLETIN  No.  219 


[May, 


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1919] 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


469 


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470 


BULLETIN  No.  219 


[May, 


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1910] 


ILLINOIS  CROP   YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


471 


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472 


BULLETIN  No.  219 


[May, 


TABLE  56.— ROCKFORD  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields—  bushels  or  (tons)  per  acre 

Corn 
23  crops 

Oats 
10  crops 

Clover 
7  crops 

Soybeans 
2  crops 

1 
2 
3 
4 
5 

L.  . 

49.4 
56.7 
65.5 
63.8 
49.9 

64.2 
67.6 
71.4 
70.4 
62.9 

(2.34) 
.78 
(2.77) 
(2.59) 
(2.36) 

13.3 
14.9 
13.9 
13.8 
14.6 

RL  

ML  

CvML  

L  

6 
7 
8 
9 
10 

LP.  .  .  . 

53.5 
61.7 
68.5 
66.9 

48.2 

73.2 
67.7 
73.0 
73.5 
64.1 

(2.73) 
.52 
(3.13) 
(2.92) 
(2.35) 

16.7 
18.6 
17.7 
18.8 
16.0 

RLP  

MLP  

CvMLP  

L  

11 
12 
13 
14 
15 

LPK 

65.0 
67.0 
68.8 
68.4 
52.8 

69.1 
69.6 
69.1 
73.0 
64.0 

(3.21) 
.60 
(3.60) 
(3.28) 
1.32 

18.2 
17.2 
17.4 
16.2 
16.1 

RLPK  

MLPK  

CvMLPK.....  

L  

16 
17 
18 
19 
20 

R.  . 

58.9 
62.9 
65.0 
68.7 
46.3 

08.1 
70.5 
71.6 
70.2 
66.3 

.82 
.95 
.74 
.70 
(2.05) 

18.4 
17.0 
15.0 
15.5 
15.9 

RP  

RPK  

RLNPK.  

0  

1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


473 


TABLE  57. — SIDELL  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  EARLY  WISCONSIN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

19121 
Oats 

1913 

Clover2 

1914 
Wheat2 

1915 
Corn 

1916 
Oats 

1917 
Soy- 
beans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

30.0 
32.0 
42.7 
34.1 

(1.11) 
(1.14) 
(1.30) 
(1.04) 

34.0 
34.0 
31.2 
36.9 

48.1 
54.8 
58.5 
71.2 

56.9 
63.9 
61.4 
66.1 

(1.74) 
(1.88) 
(1.88) 
(1.82) 

M  

ML  

MLP  

105 
106 
107 
108 

0  

47.2  * 
50.0 
46.4 
44.8 

1.00 
.83 
.92 
.83 

33.2 
34.8 
34.9 
38.8 

47.5 
47.6 
52.1 
52.5 

50.2 
51.1 
54.2 
56.9 

(1.23) 

R              

RL  

RLP  

109 
110 

RLPK  

38.4 
49.8 

1.00 

(1.31) 

41.2 
30.5 

51.4 
48.0 

57.2 
54.5 

(i'44) 

0  

Corn 

Oats2 

Soy- 
beans2 

Wheat2 

Corn 

Oats 

201 
202 
203 
204 

0... 

48.4 
39.7 
39.5 
40.7 

3.4 

2.7 
2.7 
3.0 

12.2 

(1.58) 
(1-67) 
(1.57) 

10.8 

7.2 
6.2 

7.2 

28.9 
31.6 
31.9 
33.1 

80.6 
80.3 
80.5 
84.5 
74.1 
75.2 
73.6 
76.9 

M  

ML  

MLP  

205 
206 
207 
208 

0  

38.7 
42.7 
24.8 
42.6 

2.3 
1.9 
2.7 
2.3 

11.0 
11.4 
10.0 
9.2 

7.5 
6.7 
6.2 
6.9 

25.9 
34.7 
33.6 
34.8 

R           

RL  

RLP  

209 
210 

RLPK  

42.7 
43.2 

3.0 
3.1 

8.6 
9.2 

6.7 
5.5 

35.3 
24.9 

73.0 
65.2 

0  

Oats 

Corn 

Oats 

Soy- 
beans 

Wheat 

Corn 

301 
302 
303 
304 

0... 

52.5 
53.7 
52.0 
53.6 

40.9 
34.6 
33.3 
35.5 

46.2 
44.5 
42.5 
44.5 

(1.42) 
(1.20) 
(1.30) 

(1.22) 

24.6 
17.1 
10.4 
14.9 

65.1 
66.6 
63.3 
59.8 

M  

ML  

MLP  

305 
306 
307 
308 

0  

55.0 
53.6 
51.2 

48.8 

28.8 
31.9 
33.4 
32.4 

37.7 
38.3 
36.1 
35.2 

17.4 
15.6 
15.0 
16.7 

9.0 
7.0 
4.3 
9.0 

47.1 
49.4 
53.0 
68.0 

R  

RL  

RLP  

309 
310 

RLPK  

50.0 
47.2 

31.8 
28.4 

43.0 
40.8 

17.8 
(1.15)3 

9.9 

8.8 

67.8 
43.1 

0  

Soy- 
beans 

Wheat2 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0 

(2.42) 
(2.26) 
(2.14) 
(1.77) 

38.1 
34.9 
37.5 
34.2 

47.6 
45.7 
43.8 
46.4 

63.6 
69.2 
73.6 

74.2 

(2.75) 
(2.70) 
(2.69) 
(2  ..43) 

34.2 
42.2 
34.8 
37.2 

M  

ML  

MLP  

405 
406 
407 
408 

0... 

12.5 
12.0 
12.9 
10.8 

28.8 
27.0 
24.9 

24.8 

37.5 
41.0 
42.6 
41.6 

68.1 
62.0 
61.6 
63.4 

2.67 
2.58 
2.75 
3.08 

34.8 
33.8 
29.6 
36.2 

R  

RL  

RLP  

409 
410 

RLPK  

13.3 

(1.54) 

22.4 
20.1 

43.7 
33.9 

62.2 
67.5 

2.92 

(2.23) 

32.9 
28.2 

0  

JNo  soil  treatment.    2No  manure.    "Estimated. 


474 


BULLETIN  No.  219 


[May, 


TABLE  57. — SIDELL  FIELD,  Concluded 


Plot 
No. 

Soil 
treatment 
applied 

1912 

1913 
Alfalfa4 

1914 
Alfalfa* 

1915 
Alfalfa4 

1916 
Alfalfa4 

1917 
Alfalfa4 

Bushels  or  (tons)  per  acre 

501 
502 
503 
504 

0  

(2.92) 
(3.20) 
(3.78) 
(4.20) 

(3.78) 
(4.62) 
(4.20) 
(4.49) 

(4.06) 
(4.34) 
(4-17) 
(4.13) 

(2.50) 
(2.73) 
(2.68) 
(3.24) 

(4.  20) 
(4.28) 
(3.80) 
(4.55) 

M  

ML  

MLP  

505 
506 
507 
508 

0... 

(1.44) 
(1.17) 
(1.83) 
(3.06) 

(3.23) 
(3.14) 
(3.42) 
(3.85) 

(3.67) 
(3.65) 
(3.36) 
(4.07) 

(2.55) 
(2.73) 
(2.37) 
(2.68) 

(3.47) 
(3.29) 
(3.07) 
(4.00) 

R  

RL  

RLP  

509 
510 

RLPK  

(3.50) 

(1.22) 

(4.49) 
(3.51) 

(4.79) 
(3.84) 

(2.83.) 
(2.33) 

(4.16) 
(2.68) 

0  

4No  residues. 


TABLE  58. — SIDELL  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats 
4  crops 

Wheat 
4  crops1 

Clover 
1  crop 

Soybeans 
3  crops 

1 
2 
3 
4 

0.. 

46.1 
46.7 
46.2 
49.2 

61.8 
64.5 
64.5 
67.3 

25.9 
25.1 
20.7 
24.0 

(2.75) 
(2.70) 
(2.69) 
(-2.43) 

(1.64) 
(1.55) 
(1.62) 
(1.54) 

M  

ML  

MLP  

5 

6 

7 
8 

0.  . 

37.4 
40.9 
43.0 
45.9 

57.5 
56.7 
56.4 
58.1 

21.1 
20.6 

18.8 
22.7 

2.67 
2.58 
2.75 
3.08 

13.6 
9.0 
8.3 
8.6 

R  

RL  

RLP  

9 
10 

RLPK  

46.0 
35.7 

58.9 
57.0 

22.7 
18.2 

2.92 

(2.23) 

8.8 
(1.31) 

0  

GENERAL  NOTES.  —  The  crop  rotation'  and  soil  treatment  are  standard,  as 
described  in  the  introduction,  with  the  exception  that  alfalfa  is  grown  on  a  fifth 
field,  which  after  producing  alfalfa  for  five  years  will  be  thrown  into  the  regu- 
lar rotation.  (The  natural  productiveness  of  this  field  decreases  from  Plot  1 
to  Plat  10.) 

JNo  manure  on  1914  and  1915  wheat. 


v  ;'^ 

*  -  s  • 


i    ^ 
<.' 


,-_    J.Vii    **' 


1919] 


ILLINOIS  CROP   FIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


475 


TABLE  59.— SPARTA  FIELD,  MAIN  ROTATION:  CROP  YIELDS  IN 
SOIL  EXPERIMENTS 

LIGHT-GRAY  SILT  LOAM  ON  TIGHT  CLAY,  TIMBER  SOIL;  LOWER  ILLINOISAN 

GLACIATION 


Plot 
No. 

Soil  treatment  applieJ 

1916 
Corn1 

1917 
Soybeans3 

Bushels  or  (tons  )per  acre 

101 
102 
103 
104 
105 
106 
107 
108 

0 

14.8 
18.2 
16.8 
19.8 

(   -99) 
(1.05) 
(1.33) 

(1.36) 

M  .                  » 

ML     .               .      

MLP  

0  . 

13.8 
16.6 
21.2 
20.0 

5,8 
9.2 
9.8 
9.5 

R  

RL  

RLP  

109 
110 

RLPK  

18.6 
17.4 

11.3 

(  -99) 

0  

Soybeans1 

Corn 

201 
202 
203 
204 

0 

(1.37) 
(1.16) 
(1.41) 
(1-60) 

28.0 
31.4 

49.4 
49.4 

M  

ML  

MLP  

205 
206 
207 
208 

0.. 

7.7 
7.2 
10.3 

8.8 

28.2 
36.0 
35.0 
39.0 

R  

RL.            

RLP  

209 
210 

RLPK.  . 

9.7 
(  -96) 

47.0 
28.0 

0  

Wheat2 

Soybeans3 

301 
302 
303 
304 

0.. 

6.3 
6.7 
9.0 
8.2 

(   .76) 
(  .85) 
(  -70) 
(  -63) 

M.... 

ML   

MLP  

305 
306 
307 
308 

0.. 

1.8 
3.7 
8.8 
9.2 

3.3 
4.7 

8.8 
9.7 

R  

RL  

RLP  

309 
310 

RLPK.  .  . 

11.0 
5.0 

8.3 
(  .66^ 

0  

Soybeans1 

Wheat3 

401 
402 
403 
404 

0.. 

(   .48) 
(  .67) 
(  .73) 
"    (  .80) 

10.5 
15.0 

24.2 
27.2 

M..    

ML  

MLP  

405 
406 
407 
403 

0  

5.2 
6.3 
8.0 
6.0 

18.8 
17.2 
23.5 
25.3 

R.    . 

RL.  .. 

RLP  

409 
410 

RLPK.  .  . 

6.5 
(  .61) 

23.5 
16.2 

0  

1No  residues,  manure,  or  potassium.    2No  residues  or  manure.    sNo  manure. 


476 


BULLETIN  No.  219 


[May, 


TABLE  59a.— SPARTA  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 
EXPERIMENTS 

YELLOW-GRAY  SILT  LOAM,  TIMBER  SOIL;  LOWER  ILLINOISAN  GLACIATION 


Plot 

Soil  treatment  applied 

1916 

Soybeans1 

1917 
Potatoes 

JNo. 

Bushels  or  (t 

ons)  per  acre 

501 

0  . 

(1.28) 

25  5 

502 

M  .                     

(1.20) 

35  0 

503 

ML                            

(1  28) 

34  0 

504 

MLP  

(1.22) 

33.5 

505 

MLPK  

(1.20) 

23.3 

506 

0  

(1-07) 

12.2 

Alfalfa2 

601 

0.. 

(   -49) 

602 

M  

(  .58) 

603 

ML  

(3.23) 

604 

MLP.  . 

i 

(3.25) 

605 

MLPK  

(1  72) 

606 

0  

(  -00) 

Wheat1 

Soybean 
hay2 

701 

0.  . 

5  7 

(1  51) 

702 

M  

5  3 

(1  52) 

703 

ML  

5.2 

(1.89) 

704 

MLP  

4.0 

(1.801 

705 

MLPK  

3  0 

(1.89) 

706 

0  

.3 

(  -91) 

Potatoes1 

Wheat2 

801 

0... 

30  3 

24  8 

802 

M  

25  5 

20  5 

803 

ML  

30  5 

22  0 

804 

MLP.  .  . 

17  2 

27  2 

805 

MLPK  

17.2 

30  2 

806 

0  

32.0 

22.3 

GENERAL  NOTES. — The  major  rotation  consists  of  corn,  soybeans,  wheat,  and 
alsike   clover.     The  minor   rotation  is  potatoes,   wheat,  and   alsike   clover,  with 
alfalfa  on  a  fourth  field,  which  remains  down  while  the  three  crops  go  thru  two 
rotations.     The  soil  treatment  is  standard,  as  described  in  the  introduction, 
and  potassium  only.     2No  manure. 


1919] 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


477 


TABLE  60.— SPRING  VALLEY  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM,  FORMERLY  TIMBERED;  EARLY  WISCONSIN  GLACIATION 


Plot 
No. 

Soil  treatment  applied 

19151 
Corn 

1916 
Oats2 

1917 
Clover2 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0.  . 

34.8 
27.8 
26.4 
34.4 

35.9 
32.5 
29.7 
35.9 

(2.26) 
(1.83) 
(2.36) 

(2.40) 

M  

ML  „  

MLP  

105 
106 
107 
108 

0  

35.0 
30.4 
31.2 
30.2 

26.9 
31.2 
34.4 
38.1 

.03 
.05 
.03 
.05 

R  

RL  

RLP  

109 
110 

RLPK  

33.0 
35.0 

36.9 
35.9 

.03 
(1.34) 

0  

Wheat 

Corn 

Oats 

201 
202 
203 
204 

0.  . 

19.0 
8.2 
6.3 
15.5 

25.8 
13.8 
10.4 

17.8 

56.2 
44.1 
39.1 
49.7 

M   

ML  

MLP  

205 
206 
207 
208 

0.. 

15.8 
15.5 
21.2 
20.8 

14.6 
19.8 
30.0 
26.2 

40.9 
39.7 
47.8 
55.6 

R. 

RL  

RLP  

209 
210 

RLPK  

18.8 
13.5 

25.0 
20.2 

42.2 
42.5 

0  

Soybeans 

Wheat2 

Corn 

301 
302 
303 
304 

0.. 

17.5 

(1.36) 
(1.40) 
(1.54) 

26.0 
17.3 
16.3 
21.2 

23.6 
32.4 
29.6 
44.0 

M  

ML  

MLP  

305 
306 
307 
308 

0.. 

16.5 
17.2 
17.3 

17.5 

20.7 
17.2 
23.8 
19.2 

23.8 
46.2 
48.0 
45.6 

R  

RL  

RLP  

^09 
310 

RLPK  

17.0 
16.5 

14.3 
16.7 

50.4 
20.0 

0  

Oats 

Clover2 

Wheat2 

401 
402 
403 
404 

0.  . 

41.2 
38.4 
23.1 
34.7 

(2.31) 
(2.00) 
(1.92) 
(2.33) 

3d.  5 
33.0 

32.8 
38.2 

M  

ML  

MLP  

405 
406 
407 
408 

0.  . 

33.8 
28.8 
38.1 
32.5 

.10 
.17 
.12 
.15 

35.0 
37.3 
39.3 
41.8 

R  

RL  

RLP  

409 
410 

RLPK  .  . 

38.8 
31.9 

.15 

(2.33) 

39.0 
35.0 

0  

NOTE. — The  crop  rotation  and 
the  introduction. 

1Lime  only.     2No  manure. 


soil  treatment  are  standard,  as  described  in 


BULLETIN  No.  219 


[May, 


TABLE  61.— TOLEDO  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
GRAY  SILT  LOAM  ON  TIGHT  CLAY,  PRAIRIE;  LOWER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

19131 
Soybeans 

1914 
Wheat2 

1915 
Corn 

1916 
Oats 

1917 
Soybeans 

Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

(   .54) 
(  -35) 
(   -54) 
(   -49) 

11.2 
11.4 
15.1 
17.0 

33.7 
31.4 
38.1 
41.1 

28.4 
27.8 
38.6 
40.3 

(1.09) 
(1.06) 
(1.62) 
(1.56) 

M  

ML  

MLP  

105 
106 
107 
108 

0 

2.5 
3.7 
3.6 
3.2 

8.3 
8.2 
10.0 
12.6 

28.7 
28.2 
29.0 
24.6 

26.1 
21.9 
35.8 
34.5 

4.9 
7.3 
10.0 
12.5 

R  

RL  

RLP  

109 
110 

RLPK  

3.5 

(  -53) 

15.7 
7.0 

38.1 
22.0 

42.0 
24.1 

14.1 

(  -74) 

0  

Oats 

Soybeans2 

Wheat2 

Corn 

Oats 

201 
202 
203 

204 

0.  . 

1.1 
1.2 
.9 
.8 

.(  .68)3 
(  -50) 
(   -46) 
(  -48) 

6.2 
4.7 
12.0 
14.4 

26.6 
29.1 
32.2 
29.8 

•  5.2 
5.6 
25.6 
37.8 

M  

ML  

MLP  

205 
206 
207 
208 

0.. 

.5 
.9 
1.1 
1.9 

5.2 
5.0 
7.0 

7.4 

2.7 
3.0 
12.0 
17.7 

19.4 
14.4 
22.3 
21.1 

5.8 
17.5 
29.7 
37.0 

R  

RL  

RLP  

209 
210 

RLPK  .  .  . 

.6 
1.1 

7.0 
(  .40)' 

25.9 

8.8 

22.8 
17.6 

53.3 
16.1 

0  

Corn 

Oats8 

Soybeans2 

Wheat2 

Corn 

301 
302 
303 
304 

0.  . 

3.8 
3.6 
5.1 
5.4 

0.0 
.2 
.8 
.6 

(  -62) 
(  -66) 
(  -96) 
(1.02) 

.1 
.1 

.7 
2.6 

5.6 
12.1 
17.2 
18.2 

M  

ML  

MLP  

305 
306 
307 
308 

0.. 

3.0 
3.7 
5.5 
3.9 

.2 
.2 
.6 
.5 

7.2 
7.4 
13.2 
12.6 

.1 
.2 
3.2 
3.8 

6.1 
6.2 
19.5 
22.4 

R  

RL  

RLP  

309 
310 

RLPK  .  .  . 

4.4 
3.6 

.8 
.3 

12.3 

(  -87) 

10.8 
.1 

25.3 
•      6.6 

0  

Oats 

Corn 

Oats 

Clover 

Wheat 

401 
402 
403 
404 

0.  . 

.9 
.9 
1.1 
.9 

24.7 
27.5 
30.3 
32.5 

22.0 
21.6 
27.2 
26.9 

(  -16) 
(  -37) 
(  -82) 
(  -88) 

9.8 
12.8 
27.5 
33.6 

M  

ML  

MLP  

405 
406 
407 
408 

0.. 

.8 
.8 
.8 
.9 

25.8 
27.5 
25.1 
27.6 

18.9 
23.6 
30.5 
29.4 

.08 
.25 
.67 
.14 

7.6 
13.8 
30.2 
33.2 

R  ... 

RL  

RLP  

409 
410 

RLPK  .  .  . 

.6 

.8 

28.4 
25.2 

38.6 
20.3 

.19 

(  .64) 

35.8 
2.5 

0  

aLime  only.    'No  manure.    "Estimated. 


. 


1919} 


ILLINOIS  CKOP  YIELDS  FROM  SOIL  EXPERIMENT   FIELDS 


479 


TABLE  62. — TOLEDO  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
4  crops 

Oats 
4  crops1 

Wheat 
4  crops2 

Clover 
1  crop 

Soybeans 
3  crops3 

1 
2 
3 

4 

0.  . 

22.7 
25.0 
29.4 
30.4 

13.9 
13.8 
23.0 
26.4 

6.8 
7.2 
13.8 
16.9 

(  -16) 
(  -37) 
(  -82)  . 
(  -88) 

(   -80) 
(   -74) 
(1.01) 
(1.02) 

M  

ML  

MLP  

6 

6 

7 
8 

0.  . 

20.0 
19.1 
24.0 
23.9 

12.8 
15.8 
24.1 
25.3 

4.7 
6.3 
13.9 
16.8 

.08 
.25 
.67 
.14 

5.8 
6.6 
10.7 
10.8 

R  

RL  

RLP  

9 
10 

RLPK  

28.7 
17.9 

33.7 
15.2 

22.0 
4.6 

.19 

(   .64) 

11.1 

(   -67) 

0  

NOTE. — The  crop  rotation  and  soil  treatment  are  standard,  as  described  in 
the  introduction. 

1One  crop  without  manure.  sT"bree  crops  without  manure.  "Two  crops  with- 
out manure. 


480 


BULLETIN  No.  219 


[May, 


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482 


BULLETIN  No.  219 


[May, 


TABLE  63a.— UNION  GROVE  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 


Plot 
No. 

Soil 
treatment 
applied1 

1913 
Potatoes 

1914 
Potatoes 

1915 

Potatoes 

1916 
Alfalfa 

1917 
Alfalfa 

Bushels  or  (tons)  per  acre 

301 
302 
303 
304 

0.. 

46.8 
112.2 
83.7 
91.7 

59.2 
142.3 
113.6 
117.5 

66.8 
265.0 
237.4 
251.8 

(1.60) 
(5.35) 
(5.54) 
(5.67) 

M  

ML  

MLP  

Alfalfa 

Alfalfa 

Potatoes 

Potatoes 

401 
402 
403 
404 

0.   . 

(3.30) 
(3.55) 
.(3.81) 
(3.58) 

(4.74) 
(4.72) 
(4.87) 
(5.00) 

68.4 
143.5 
•123.3 
115.2 

54.6 
149.2 
152.5 
134.2 

M  

ML   

MLP  

Alfalfa 

Alfalfa 

Alfalfa 

AlfaKa 

501 
.502 
503 
504 

0  .            

(3.03) 
(3.32) 
(4.40) 
(5.34) 

(4.47) 
(4.50) 
.     (5.24) 
(5.57) 

(4.12) 
'(4.12) 
(4.99) 
(5.88) 

M  

ML  

MLP  

VNo  manure  for  alfalfa  on  Series  400  or  500. 


TABLE  64.— UNION  GROVE  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

'Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
6  crops 

Oats 
2  crops 

Barley 
1  crop 

Clover 
2  crops 

Soy- 
beans 
1  crop 

Potatoes 
5  crons 

1 

2 
3 
4 
5 

L.  . 

36.3 
51.6 

57.8 
56.2 
36.6 

51.8 
56.7 
54.8 
52.9 
42.1 

44.7 
53.9 
60.2 
55.9 
41.7 

(3.56) 
1.09 

(3.86) 
(3.47) 
(3.11) 

(1.55) 
17.7 
(2.41) 
(2.38) 
(1.50) 

RL  

ML  

CvML  

L  

6 
7 
8 
9 
10 

LP.  . 

39.8 
55.0 
59.1 
60.1 
38.1 

51.3 
65.3 
47.1 
55.1 
50.6 

54.9 
.    62.2 
61.5 
57.7 
47.7 

(3.39) 
1.17 

(3.51) 
(3.65) 
(3.56) 

(1.30) 
14.8 
(2.20) 
(2.30) 
(1.62) 

RLP  

MLP  

CvMLP  

L  

11 
12 
13 
14 
15 

LPK.  . 

54.1 
61.2 
61.1 
59.4 
26.3 

54.0 
65.8 
55.3 
54.9 

47.7 

60.9 
64.3 
56.7 
61.9 
45.0 

(3.94) 
.80 
(3.17) 
(3.10) 
1.38 

(1.60) 
16.8 
(2.25) 
(2.18) 
14.2 

RLPK  

MLPK  

CvMLPK  

L  

16 
17 
18 
19 
20 

R  . 

41.3 

48.7 
56.4 
59.7 
26.4 

58.2 
66.5 
66.5 
66.3 
54.6 

54.5 
58.6 
58.8 
57.6 
45.5 

1.41 
1.42 
1.25 
1.17 

(2.33) 

15.9 
12.7 
16.4 
17.1 

(1.08) 

RP  

RPK  

RLNPK  

0  

1 

2 
3 
4 

0  

51).  2 
162.4 
142.1 
142.1 

M  

ML  

MLP  

GENERAL  NOTES. — The  main  rotation  consists  of  corn,  corn,  oats,  and  clover. 
The  soil  treatment  as  indicated  for  each  plot  is  standard,  as  described  in  the 
introduction,  with  the  exception  that  potassium  is  supplied  in  100  pounds  of 
potassium  sulfate  per  acre  per  year  and  that  one  half  of  Plot  19  receives  200 
pounds  of  dried  blood  and  the  other  half  376  pounds  of  gluten  meal,  per  acre 
per  year. 

The  minor  rotation  consists  of  potatoes  and  alfalfa.  The  potatoes  are 
grown  on  the  same  land  for  three  years  while  the  alfalfa  is  grown  for  six  years. 
The  soil  treatment  is  standard,  as  described  in  the  introduction,  except  that  15 
tons  per  acre  of  manure  is  applied  for  each  potato  crop. 


1919} 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


483 


TABLE  65.— UNIONVILLE  FIELD,  MAIN  ROTATION :  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 
YELLOW-GRAY  SILT  LOAM,  TIMBER  SOIL;  UNGLACIATED 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1911 
Seed 
cotton,1 
Ibs. 

1912 
Corn1 

1913 
Cow- 
peas4 

1914 
Wheat3 

1915 
Seed 
cotton, 
Ibs. 

1916 
Corn 

1917 
Cow- 
peas 

»        Bushels  or  (tons)  per  acre 

101 
102 
103 
104 

0  

1120 
793 
710 
625 

36.6 
30.8 
46.5 
47.2 

(1.19) 
(  -70) 
(1-20) 
(1.01) 

13.6 
13.4 
20.4 
20.5 

340 
525 
935 
775 

44.1 
47..  9 
61.2 
54.0 

(   .83) 
(1.07) 
(1.50) 
(1.32) 

M  

ML  

MLP..  . 

105 
106 
107 
108 

0.  . 

450 
440 
403 
350 

36.3 
37.1 
56.7 
53.8 

5.1 

6.4 
6.2 
7.0 

11.7 
14.7 
23.2 
25.2 

155 
65 
390 
430 

37.2 
38.1 
56.8 
60.5 

4.4 
4.2 
4.6 
3.7 

R  

RL  

RLP.  .  .  . 

109 
110 

RLPK.. 
0  

483 
323 

53.1 
28.1 

8.1 
(   .64) 

26.7 

8.8 

575 
265 

59.8 
32.0 

5.0 

(  .80) 

Wheat2 

Seed 
cotton, 
/6s. 

Corn 

Cow- 
peas 

Wheat 

Seed 
cotton, 
/6s. 

Corn 

201 
202 
203 
204 

0.  . 

15.8 
16.3 
15.9 
17.6 

22 
32 
150 
170 

18.2 
24.9 
31.4 
34.5 

(   .34) 
(  -24) 
(  -23) 
(   .29) 

9.8 
11.6 
18.7 
22.5 

485 
490 
590 
600 

21.0 
23.6 
30.1 
35.7 

M  

ML  

MLP..  . 

205 
206 
207 
208 

0  

16.6 
14.0 
15.2 
14.3 

45 
25 
•     55 

82 

21.0 
17.1 
23.3 
27.1 

.8 
3.8 
2.2 
2.5 

11.0 
12.8 
19.2 
26.3 

490 
365 
395 
600 

20.6 
24.4 
48.3 
47.9 

R  

RL   

RLP.... 

209 
210 

RLPK.. 
0  

17.8 
12.8 

178 
35 

33.0 
19.6 

4.4 
(  .34) 

30.8 
11.1 

820 
290 

56.8 
24.4 

Cow- 
peas1 

Wheat3 

Seed 
cotton, 
Ibs. 

Corn 

Cow- 
peas 

Wheat 

Seed 
cotton, 
Ibs. 

301 
302 
303 
304 

0  . 

5.5 
5.6 
5.7 
6.6 

4.1 
3.0 
6.2 

7.4 

265 
532 
690 
960 

6.6 
5.1 
4.6 
4.9 

(   -50) 
(  -56) 
(  -94) 
(2.33) 

3.8 
7.5 
14.9 
22.3 

62 
90 
385 
325 

M  

ML  

MLP... 

305 
306 
307 
308 

0.  . 

5.7 
7.3 
6.9 

7.8 

4.0 
3.9 
5.6 

8.1 

212 
192 
188 
232 

3.0 
3.0 
6.2 
5.0 

.3 
.3 
.6 
.5 

4.8 
5.7 
12.8 
19.2 

52 
55 
210 
210 

R  

RL  

RLP.  .  .  . 

309 
310 

RLPK.. 
0  

8.9 
5.5 

12.6 
5.1 

365 
162 

5.6 
3.9 

.8 
(  -44) 

24.5 
5.7 

355 
65 

Corn1 

Cow- 
peas* 

Wheat3 

Seed 
cotton, 
/6s. 

Corn 

Cow- 
peas 

Wheat 

4.3  ' 
8.7 
15.4 
19.3 
4.9 
5.3 
15.6 
17.0 

401 
402 
403 
404 

0.. 

31.5 
36.1 
36.9 
34.0 

(  -54) 
(  -55) 
(  -71) 
(  -78) 

2.8 
4.0 
9.8 
12.5 

235 
430 
530 
435 

35.2 
50.2 
54.2 
53.4 

(  -77) 
(1.03) 
(1.34) 
(1.50) 

M  

ML  
MLP... 

405 
406 
407 
408 

0.  . 

27.8 
26.4 
30.4 
31.1 

(  -54) 

2.3 
1.8 
10.9 
13.2 

215 
245 
200 
250 

34.7 
36.6 
46.8 
53.6 

.5 
.5 
.4 
.5 

R  

RL  

RLP.  .  .  . 

409 
410 

RLPK.. 
0  

36.2 
27.1 

•'(".50) 

15.2 
1.1 

355 
310 

56.2 
33.1 

.6 

(  .77) 

19.6 
3.2 

'Lime  only, 
or  potassium. 


2No  manure  or  residues.     3JMo  manure.     4No  manure,  phosphate, 


484 


BULLETIN  No.  219 


[May, 


TABLE  65a— UNIONVILLE  FIELD,  MINOR  ROTATION:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 


Plot 
No. 

Soil 
treat- 
ment 
applied 

1911 
Cow- 
peas 

1912 

1913 
Alfalfa 

1914 

Alfalfa 

1915 
Alfalfa 

1916 
Soy- 
beans 

1917 
Potatoes 

Bushels  or  (tons)  per  acre 

501 
502 
503 
504 

0 

(  -09) 
(1.16) 
(  -66) 

(  -84) 

(   .44) 
(1.33) 
(1.09) 

(1.07) 

(   -42) 
(1.97) 
1.47) 
(1.49) 

5.2 
16.8 
15.1 
14.5 

13.9 
95.7 
17.1 
27.5 

MLP   .  . 

RLP 

RLPK  .  . 

505 
506 
507 
508 

0 

(  -15) 
(  .33) 
(  .62) 
(  -38) 

(  -53) 
(  -43) 
(  .33) 

(   .47) 

(  -88) 

3.5 
5.3 
9.4 

7.5 

17.9 
20.2 
20.3 
18.7 

0 

o 

0  

Wheat2 

Clover8 

Potatoes 

Wheat 

Alfalfa 

Alfalfa 

601 
602 
603 
604 

0 

4.4 
7.7 
7.7 
11.6 

(  -50) 
(  -95) 
.75 
.50 

23.2 
3.0 

5.8 
7.0 

11.4 
33.9 
20.8 
24.7 

(  -66) 
(5.05) 
(3.79) 
(4.34) 

(  .35) 
(2.83) 
(1.86) 
(1.94) 

MLP.  .  . 

RLP 

RLPK.. 

605 
606 
607 
608 

0 

7.0 
7.5 
5.5 
5.5 

(  -60) 
(  .89) 
(   -99) 
(1.16) 

7.6 
13.2 
5.7 
9.3 

14.2 
15.8 
12.6 
14.8 

(1.44) 
(1.47) 
(1.50) 

(1.78) 

(  .56) 

(  .68) 
(   -68) 
(  -61) 

0 

0     

0  

Cow- 
peas1 

Potatoes 

Wheat 

Soy- 
beans 

Potatoes 

Wheat 

Clover 

701 
702 
703 
704 

0.  . 

5.4 
6.2 

18.0 
31.6 
11.8 
8.5 

3.5 
30.8 
18.5 
19.9 

(  -18) 
(  .58) 
1.1 
1.1 

21.6 
218.4 
45.0 
30.6 

4.5 
23.8 
13.7 
13.4 

(  -52) 
(2.00) 
1.42 
1.33 

MLP... 
RLP.... 

RLPK.. 

705 
706 
707 
708 

0  

2.9 

8.5 
12.3 
5.7 
9.3 

3.7 
5.6 
2.9 
4.8 

.5 

(  -17) 
(  -12) 
(  .13) 

18.7 
15.0 
13.1 
22.4 

4.4 
4.0 
3.4 

4.2 

(  -41) 
(  -48) 
(  .39) 
(  .66) 

0  

0  

0  

Wheat2 

Soy- 
beans8 

Potatoes 

Wheat 

Soy- 
beans 

Potatoes 

Oats 

801 
802 
803 
804 

0.  . 

16.0 
18.3 
15.5 
17.1 

(  -29) 
(  -66) 
2.8 
4.2 

4.5 
6.0 
6.4 
6.3 

10.0 
24.6 
24.4 
23.5 

(  -83) 
(2.44) 
6.8 
4.2 

3.2 
13.5 
3.7 
4.4 

21.1 
30.3 
46.2 
44.5 

MLP... 
RLP.... 
RLPK.. 

805 
806 
807 
808 

0  

15.2 
13.7 
14.0 
14.0 

1.2 

(  -28) 
(  -31) 
(  -35) 

4.0 
7.8 
7.1 
7.1 

13.5 
14.5 
13.8 
14.1 

1.9 

(  .88) 
(1.08) 
(1-26) 

1.2 
2.0 
1.4 
1.8 

26.7 
24.1 
24.7 
24.4 

0  

0  

0  

1Ldme  only.     sNo  manure  or  residues.     'No  manure. 


1919} 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


485 


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486 


BULLETIN  No.  219 


[May, 


TABLE  67.— URBAN  A  FIELD,  MORROW  PLOTS:  CROP  YIELDS  IN  SOIL 

EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  EARLY  WISCONSIN  GLACIATION 


Years 

Soil 
treatment 
applied 

Corn 
every 
year 

Two-year  rotation 

Three-year  rotation 

Corn 

Corn         Oats 

Corn          Oats             Clover 

Bushels  or  (tons)  per  acre 

1879 
-87 
1888 
18o9 
1890 
1891 
1892 
1893 
1894 
1895 
1896 
1897 

None  

(4.04) 

(1.51) 
(1.46) 

None  

54.3 
43.2 
48.7 
28.6 
33.1 
21.7 
34.8 
42.2 
62.3 
40.1 

49.5 

54^3 
33.2 

29^6 

iiie 

47!6 

37^4 

48.6 

None  

None  

None  

None  

37.2 
57!2 
34^5 

70.2 
34.1 

65.  1 
22.2 

None  

None  

None 

None  

None  

1898 
1899 
1900 
1901 
1902 
1903 
1904 
1904 
1905 
1905 
1906 
1906 
1907 
1907 

None  

18.1 
50.1 
48.0 
23.7 
60.2 
26.0 
21.5 
17.1 
24.8 
31.4 
27.1 
35.8 
29.0 
48.7 

U.iij" 

(1.42)1" 

(1.74)1 

None  

44.4 
33^7 
35!9 

s6!6 

44.9 

47^8 
87.6 

41.5 
5Q.3 

53.5 
34  .'3 

54!6 

None  

None  

None  

None  .... 

None  

17.5 
25.3 

34!7 
52.4 

55.3 

72.7 

86!5 
93.6 

42.3 
50.6 

MLP  

None  '. 

MLP  

None     .... 

MLP  

None  

MLP...  .    . 

1908 
1908 
1909 
1909 
1910 
1910 
1911 
1911 
1912 
1912 
1913 
1913 
1914 
1914 
1915 
1915 
1916 
1916 
1917 
1917 

None  

13.4 
28.0 
26.6 
31.6 
35.9 
54.6 
21.9 
31.5 
43.2 
64.2 
19.4 
32.0 
3L.6 
39.4 
40.0 
66.0 
11.2 
10.8 
40.0 
78.0 

33^6 
64.8 

28^6 
46.3 

29^2 
25.0 

49^6 

81.2 

48^4 
81.4 

32.9 
45.0 

40.0 
44.4 

(  .65)"    .64 
(1.73)     1.17 

16.  31" 
20.  01 

24.  2r' 
27.  11 

MLP  

None  

MLP  

33^8 
59.4 

55!6 
81.0 

33^6 
58.2 

58!  6 
83.3 

33  '.8 

47.8 

20^6 
38  0 

39!6 
60.4 

None  

MLP  

None  

MLP  

None  

MLP  

None  

MLP  

None  

MLP  

None  

MLP  

None  

37.5 
64.7 

27.8 
40.6 

68!4 
86.9 

MLP  

None  

MLP  

Soybeans. 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


487 


1    TABLE  67. — URBANA  FIELD,  MORROW  PLOTS,  Concluded 


Years 

Soil 
treatment 
applied 

Corn 
every 
year 

Two-year  rotation 

Three-year  rotation 

Corn 

Corn     |     Oats 

Corn    |     Oats 

Clover 

Bushels  or  (tons)  per  acre 

Average  of  Crops  Within  Ten- Year  Periods 


1888 
to  1897 

None  

40.9 

42.5 

41.6 

52.1 

45.3 

(2.34) 

1898 

None  

32  9 

42.4 

37  5 

55  7 

48  4 

(1  27)a 

to  1907 

MLP  

33.2 

66.2 

38.9 

83.1 

50.6 

(1.74)2 

1908 

None  

28  3 

37.6 

38  6 

40  7 

42.1 

(1.78)2 

to  1917 

MLP  

43.6 

59.7 

61.7 

57.2 

57.4     j 

(2.54)2 

GENERAL  NOTES. — The  Morrow  plots  consist  of  three  plots  divided  into  halves. 
On  one  corn  is  grown  continuously;  on  the  second  corn  and  oats  are  grown  in 
rotation;  and  on  the  third,  corn,  oats  and  clover.  The  north  half  of  each  plot 
is  untreated,  while  the  south  half  receives  standard  applications  of  manure,  cover 
crops  (in  the  one-crop  and  two-crop  systems).  Rock  phosphate  is  applied  to 
the  southwest  one-fourth  of  each  plot  at  the  rate  of  600  pounds,  and  steamed 
bone  meal  to  the  southeast  one-fourth  at  the  rate  of  200  pounds  per  acre  per  year. 
In  1904  ground  limestone  was  applied  at  the  rate  of  1,700  pounds  per  acre  to 
the  south  half  of  each  plot. 

"Beans  and  clover  averaged  together  as  hay;  10  bushels  beans  to  1  ton  hay. 


488 


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ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


489 


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490 


BULLETIN  No.  219 


[May, 


TABLE  69.— URBANA  FIELD,  NORTH  FARM:  GENERAL  SUMMARY,  FULLY 

TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
19  crops 

Oats 
17  crops 

Wheat 
7  crops 

Clover 
8  crops1 

Soy- 
beans 
4  crops 

Alfalfa 
6  crops 

1 
2 
3 
4 
5 

0... 

56.6 
56.8 
64.6 
59.8 
66.8 

47.6 
49.1, 
54.0 
50.9 
56.2 

21.9 
26.3, 
24.6 
28.3 
30.6 

(2.10) 
1.34  , 
(2.31) 
1.60 

(2.74) 

(1.60) 
21.3 
(1.68) 
20.7 

(1.72) 

(2.33) 
(2.14) 
(2.10) 
(2.32) 
(2.76) 

R  

M  

RL  -.  

ML  

6 
7 
8 
9 
10 

RLP.  . 

75.4 
72.6 
75.6 
71.6 
75.1 

64.2 
63.5 
64.4 
62.9 
62.5 

42.5 
40.1 
41.7 
39.4 
42.7 

2.16 

(3.62) 
1.64 

(3.57) 
(3.56) 

22.6 

(1.92) 
24.2 

(2.09) 
(2.17) 

(3.56) 
(3.58) 
(3.59) 
(3.63) 
(3.70) 

MLP  

RLPK  

MLPK  

MxsLPxs  ......... 

GENERAL  NOTES. — From  1902  to  1911  the  first  three  series  were  grown  to 
corn,  oats,  and  clover,  and  the  last  two  to  corn  and  oats.  Beginning  with  191.1 
the  five  series  were  thrown  into  a  rotation  of  corn,  oats,  clOver,  and  wheat,  with 
alfalfa  on  the  fifth  series.  The  alfalfa  remains  down  for  five  years  and  is  then 
moved  ahead  on  the  other  series.  Until  1908  the  phosphorus  was  applied  in  200 
pounds  of  steamed  bone  meal  per  acre  per  year;  since  that  time  this  applica- 
tion has  been  made  to  the  east  halves  only,  while  600  pounds  of  rock  phosphate 
has  been  applied  to  the  west  halves.  Air-slacked  lime  was  applied  in  1902  (250 
pounds)  and  in  1903  (600  pounds),  and  no  further  applications  were  made  until 
1911,  after  which  standard  applications  were  made  as  described  in  the  intro- 
duction. Manure  was  applied  for  corn  at  the  rate  of  4  tons  per  acre  in  the  two- 
crop  rotation  and  6  tons  in  the  three-crop  rotation  in  1905,  1906,  and  1907; 
the  residue  system  included  only  cover  crops  from  1902  to  1907;  after  which 
both  manure  and  residues  have  been  standard,  except  that  Plot  10  receives  about 
five  times  the  standard  amounts  of  manure  and  phosphorus. 

*No  manure  on  1906  clover. 


1919] 


ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT   FIELDS 


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ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


495 


TABLE  73.— URBANA  FIELD,  SOUTH  FARM:  GENERAL  SUMMARY 
SERIES  100,  200,  400 — ROTATION:  CORN,  OATS,  CLOVER,  WHEAT 


Serial 
plot 

No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn1 
12  crops 

Oats1 
12  crops 

Wheat2 
8  crops 

Clover 
4  crops 

Soybeans 
6  crops 

63 
66 
69 
70 
73 
76 
63 
66 
69 
70 
73 
76 

RP... 

59.5 
59.6 
51.7 
56.3 
61.0 
61.4 
57.6 
57.8 
47.2 
54.0 
63.6 
62.0 

48.3 
47.7 
42.8 
44.8 
49.6 
49.6 
56.0 
56.8 
49.3 
53.3 
57.8 
49.0 

41.2 
39.8 
30.0 
30.9 
41.8 
42.2 
46.1 
45.1 
27.0 
28.9 
47.4 
46.9 

.903 
1.193 
1.233 

(2.14) 
(2.88) 
(2.  79) 

17.  63 
17.  63 
16.  33 
(1.24) 
(1.39) 
(1.47) 
16.  73 
17.  53 
16.  03 
(1.32) 
(1.51) 

a.  si) 

RP  

R  

M  

MP  

MP  

RLP  

RLP  

R  

M  

MLP  

MLP.  . 

SERIES  500,  600,  700 — ROTATION:  CORN,  CORN,  OATS,  CLOVER 


Serial 
plot 
No. 

Soil 
-    treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
26  crops 

Oats 
9  crops 

Clover 
4  crops 

Soybeans 
6  crops 

43 
46 
49 
50 
53 
56 

RP.. 

52.6 
50.3 
46.5 
47.3 
52.6 
49.2 

56.7 
59.3 
53.5 
53.6 

58.4 
57.7 

1.013 
1.023 
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(1.90) 
(2.55) 
(2.34) 

14.  23 
14.  93 
13.  73 
(1.44) 
(1.59) 
(1  .  50) 

RP  

R  

M  

MP  

MP... 

SERIES  500,  600,  700 — ROTATION:  CORN,  CORN,  CORN,  SOYBEANS 


Serial 
plot 
No. 

Soil  treatment  applied 

Average  annual  yields  —  bushels  or  (tons) 
per  acre 

Corn 
35  crops 

Soybeans4 
10  crops 

63 
66 
69 
70 
73 
76 

RP.  . 

46.5 
46.7 
41.5 
43.3 
47.9 
47.1 

17.8 
18.1 
16.9 
(1.41) 
.       (1-50) 
(1.42) 

RP  

R  

M  

MP  

MP  

ment. 


x  crops  only  for  limestone  treatment.     2Five  crops  only  for  limestone  treat- 
30ne crop  of  hay.     *0ne  crop  of  cowpeas. 


400 


BULLETIN  No.  219 


[May, 


TABLE  74.—  URBANA  FIELD,  SOUTH  FARM:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
BROWN  SILT  LOAM  PRAIRIE;  EARLY  WISCONSIN  GLACIATION 

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ILLINOIS  CROP  YIELDS   FROM   SOIL  EXPERIMENT  FIELDS 


497 


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1919] 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


499 


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500 


BULLETIN  No.  219 


[May, 


TABLE  76.— VIRGINIA  FIELD:  GENERAL  SUMMARY 
FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
13  crops 

Oats 
12  crops 

Clover 
8  crops 

Soybeans  or 
cowpeas1 
4  crops 

1 
2 
3 
4 
5 

0.  . 

66.4 
68.0 
72.3 
62.6 
69.2 

48.0 
51.3 
49.4 
46.9 
44.9 

(2.36) 
.35 
(2.63) 
.50 
(2.34) 

(2.37) 
24.6 
(2.69) 
22.9 
(2  .  60) 

R  

M  

RL  

ML  

6 

7 
8 
9 
10 

RLP.  . 

74.4 
75.5 
72.8 
76.1 
71.7 

55.3 
50.6 
51.7 
55.1 
51.8 

.57 
(2.91) 
.48 
(3.42) 

rs.in 

24.9 
(2.62) 
24.2 
(2.70) 

(2.44) 

MLP  

RLPK  

MLPK  

LPK.  . 

FERTILIZER  SERIES 


Corn 
8  crops 

Oats 
4  crops 

Wheat 
4  crops 

401 

0.  . 

58.1 

44.4 

25.5 

402 

L  

52.1 

39.4 

22.0 

403 

LN  

65.1 

47.6 

27.6 

404 

LP  

51.3 

37.9 

29.4 

405 

LK  

46.8 

31.0 

15.3 

406 

LNP.  . 

68.9 

46.9 

25.7 

407 

LNK.  .  .  . 

69.3 

52.0 

25.7 

408 

LPK  .  .  . 

42.2 

24.1 

20  5 

409 

LNPK  

70.7 

46.6 

29.0 

410 

NPK  

71.1 

48.7 

29.4 

'No  manure  on  one  crop  of  cowpeas. 


ILLINOIS  CROP  YIELDS  FROM   SOIL  EXPERIMENT  FIELDS 


501 


TABLE  77.— WEST  SALEM  FIELD:  CROP  YIELDS  IN  SOIL  EXPERIMENTS 
YELLOW-GRAY  SILT  LOAM,  TIMBER  SOIL;  LOWER  ILLINOISAN  GLACIATION 


Plot 
No. 

Soil 
treatment 
applied 

1912 

Oats1 

• 

1913 
Soy- 
beans2 

1914 
Wheat2 

1915 
Corn 

1916 
Soy- 
beans 

1917 
Oats 

Bushels  or  (ton«)  per  acre 

101 
102 
103 
104 

0            

14.4 
14.4 
11.7 
12.0 

(   .32) 
(   -39) 
(   -36) 
(   .39) 

.1 

2.5 

2.7 
7.4 

15.6 
39.3 
36.6 
38.9 

(1.21) 
(1.86) 
(1-57) 
(1.68) 

5.8 
32.8 
35.8 
41.4 

ML    

ML    

MLP  

105 
10  > 
107 
108 

L.  . 

11.7 
10.2 
10.9 
11.1 

2.8 
3.3 
3.4 
3.7 

2.8 
2.3 
3.3 
7.9 

22.4 
31.5 
35.8 
43.7 

8.6 
11.8 
13.8 
16.9 

32.7 
35.2 
35.2 
40.6 

RL  

RL  

RLP  

109 
110 

RLPlv 

11.3 
10.8 

4.8 
3.7 

8.8 

.2 

49.3 
16.8 

18.9 
(   .97) 

49.2 
17.2 

0  

Cow- 
peas1 

Oats2 

Soy- 
beans2 

Wheat2 

Corn 

Soy- 
beans 

201 
202 
203 
204 

0  

(1.05) 
(1.05) 
(   -85) 
(   .88) 

7.3 
7.3 

6.4 
7.0 

(   .18)* 
(   .20) 
(  -19) 
(   .23) 

3.5 
6.6 
6.2 
12.6 

25.4 
40.8 
38.1 
41.5 

(1.06) 
(1.22) 
a.  03) 
(1.21) 

ML  

ML  

MLP  

205 
206 
207 
208 

L.  . 

(  -82) 

5.6 
G.I 
5.2 
7.3 

.9 
.8 
.9 
1.6 

5.2 
6.8 

8.2 
15.7 

26.3 
33.4 
34.7 
49.6 

5.7 
7.5 
8.0 
10.7 

RL    . 

RL  

RLP  

209 
210 

RLPK.  .  .  . 

8.6 
6.1 

1.2 
(  .09)* 

22.7 
1.7 

48.0 
15.3 

10.6 
(0.46) 

0  

(  .94) 

Corn1 

Soy- 
beans2 

Oats8 

Soy- 
beans2 

Wheat2 

Corn 

301 
302 
303 
304 

0... 

14.8 
20.2 
17.3 
12.2 

(   -67) 
(  .59) 
(   -67) 
(   -64) 

3.9 
5.2 
4.9 
5.8 

(1.40) 
(   -90) 
(   .90) 
(   -98) 

.0 
.1 
.1 
.3 

17.8 
29.4 
34.2 
34.1 

ML         

ML   -.. 

MLP  

305 
306 
307 
308 

L.  . 

9.9 
12.8 
12.5 

8.7 

4.2 
4.7 
5.8 
5.2 

5.8 
.3 
1.1 
1.7 

6.4 
8.2 
8.2 
9.8 

.1 
.1 
.1 
.1 

16.7 
25.0 
29.5 
29.7 

RL  

RL  

RLP  

309 
310 

RLPK.. 

14.7 
12.9 

4.9 
3.9 

1.9 
1.5 

13.6 

(    -99) 

1.2 
.0 

47.4 
10.3 

0  

Oats1 

Corn 

Soy- 
beans 

Oats 

Clover 

Wheat 

401 
402 
403 
404 
405 

0.  .. 

16.4 
16.6 
19.5 
17.0 
15.2 

5.0 
6.4 
10.8 
9.4 
5.4 

(   -40) 
(  -50) 
(   -58) 
(   .81) 
4.5 

13.6 
19.1 
10.5 
24.2 
28.3 

(0) 
(0) 
(0) 
(  -76) 
.42 

2.2 
6.8 
10.1 
16.8 
11.2 

ML  

ML  

MLP  

L  

406 
407 
408 
409 

RL.   . 

17.7 
18.0 
7.0 
12.2 

10.6 
9.3 
20.5 
14.2 

6.7 
7.4 
10.2 
9.6 

21.7 
23.0 
22.3 
30.9 

.92 
.83 
1.17 
2.17 

12.5 
13.0 
21.6 
23.3 

RL  

RLP.  .  . 

RLPK  

JNo  treatment.  2No  manure.  "No  manure;  small  yield  of  volunteer  oats 
harvested  as  hay  and  included  in  yields  from  Plots  1  to  5  and  Plot  10,  one  ton 
of  hay  being  counted  as  25  bushels  of  oats.  4Estimated. 


502 


BULLETIN  No.  219 


[May, 


TABLE  77. — WEST  SALEM  FIELD,  Concluded 


Plot 
No. 

Soil 
treatment 
applied 

1912 
Cow- 
peas1 

1913 
Wheat2 

1914 
Corn 

1915 
Soy- 
beans 

1916 
Oats 

1917 
Soy- 
beans 

Bushels  or  (tons)  per  acre 

501 
502 
503 
504 
505 

0... 

(   -44) 
(  -41) 
(  -46) 
(  .68) 
(  -66) 

.9 
3.8 
5.1 
3.8 
3.8 

7.7 
12.6 
8  6 
8.6 

8.4 

(  -98) 
(1.70) 
(1.71) 
(1.53) 
10.9 

2.5 
19.4 
18.6 
20.6 
15.8 

(0.33) 
(0.77) 
(0.71) 
(0.86) 
8.1 

ML  

ML  

MLP  

L  

506 
507 
508 
509 

RL.. 

5.7 
4.4 
7.8 
11.1 

12.4 
11.2 
13.5 
17.2 

13.2 
12.0 
12.6 
13.2 

18.6 
18.4 
23  4 
27.0 

7.4 
6.6 

8.5 
8.8 

RL  

RLP  

RLPK  

*No  treatment.    !No  manure. 


TABLE  78.— WEST  SALEM  FIELD:  GENERAL  SUMMARY,  FULLY  TREATED  PLOTS 


Serial 
plot 
No. 

Soil 
treatment 
applied 

Average  annual  yields  —  bushels  or  (tons)  per  acre 

Corn 
5  crops 

Oats1 
4  crops 

Wheat1 
4  crops 

Clover 
1  crop 

Soybeans 
5  crops 

1 
2 
3 
4 

0.  . 

14.3 
25.7 
25.7 
26.5 

5.8 
18.1 
16.4 
21.8 

1.4 
4.0 
4.8 
9.3 

.00 
.00 
.00 

(  -76) 

(  -78) 
(1.21) 
(1.12) 

(1.22) 

ML  

ML  

MLP  

5 
6 

7 
8 

L.  . 

15.8 
22.6 
24.1 
31.4 

19.3 
19.0 
19.4 
22.0 

4.8 
5.4 
6.1 
11.6 

.42 
.92 
.83 
1.17 

7.6 
9.3 
9.6 
11.8 

RL  

RL  

RLP  

9 

RLPK  

35.2 

27.2 

13.7 

2.17 

12.2 

GENERAL  NOTES. — The  rotation  is  wheat,  corn,  soybeans  or  cowpeas,  oats 
and  clover.  The  soil  treatment  is  standard,  as  described  in  the  introduction,  with 
the  exception  that  in  the  beginning  limestone  was  applied  to  all  plots  except  Nos. 
1  and  10.  No  further  applications  of  limestone  will  be  made  to  Plots  2,  5,  or  6; 
they  will  serve  to  test  the  value  of  the  initial  or  of  subsequent  applications. 

'One  crop  without  manure.    2Tliree  crops  without  manure. 


1919] 


ILLINOIS  CROP  YIELDS  FROM  SOIL  EXPERIMENT  FIELDS 


503 


INDEX 

(Fields  arranged  according  to  soil  types) 


PAGE 

BLACK  CLAY  LOAM 

Hartsburg 435,  36 

Urbana,  South  Farm 492,97 

Virginia 498-500 

BLACK     SILT     LOAM     ON 

CLAY 

Pana  (See  note,  p.  4G5)  . .  .  463-65 

BROWN  SILT  LOAM 

Aledo 405,  7 

Bloomington 408,  10 

Carlinville 409,10 

Carthage 411, 13 

Clayton 412,13 

DeKalb 417-19 

Dixon 420-22 

Galesburg 431-34 

Joliet 437,  38 

Kewanee 439 

LaMoille 440,  41 

McNabb 445,  47 

Minonk 446,  47 

Mt.  Morris   448, 49 

Rockf  ord 468-72 

Sidell 473,  74 

Spring  Valley    477 

Urbana,  Morrow  Plots 486,  87 

Urbana,  North  Farm 488-90 

Urbana,  South  Farm. ,,  ,491,93-96 


PAGE 


BROWN  SILT  LOAM  OVER 
SAND 

Union   Grove    .  .  480-82 


DUNE  SAND 
O'quawka  .  . . 


4G2,  63 


GRAY      SILT      LOAM      ON 
TIGHT  CLAY 

Cutler 414-16 

DuBois 423,  24 

Ewing 426,  27 

Fairfield 428-30 

Newton 450-54 

Oblong 455,56 

Odin 457-61 

Toledo 478,  79 

LIGHT  GRAY  SILT  LOAM 

ON  TIGHT  CLAY 
Sparta 475,  76 

YELLOW-GRAY  SILT  LOAM 

Antioch 406,  7 

Enf  ield 425,  27 

Lebanon  442-44 

Raleigh 466,  67 

Unionville 483-85 

West  Salem  501,2 


UNIVERSITY  OF  ILLINOIS-URBANA 


